<sect1 id="commands-palettes">
<title>Palettes</title>

<para>
This section describes &chalk;'s palettes. The palettes are usually found at
the right hand side of &chalk;'s main window. There are three palettes which
help you in customizing your images:
</para>

<sect2 id="commands-palettes-controlbox">
<title>The <guilabel>Control box</guilabel> palette</title>
<para>The <guilabel>Control box</guilabel> contains three tabs. You can get an
overview of the image, view a color histogram, and modify options for the
current tool.</para>

<sect3 id="commands-palettes-controlbox-overview">
<title><guilabel>Overview</guilabel></title>

<para>
<screenshot>
<screeninfo>The <guilabel>Overview</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-overview.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Overview</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Overview</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>This tab offers you two settings. With the spinbox, slider, and
<guibutton>1:1</guibutton> button at the bottom, you can set the zoom level
for the document. The <guilabel>Exposure</guilabel> slider and textbox can be
used to choose the exposure level for OpenEXR images. Furthermore, the
<guilabel>X</guilabel> and <guilabel>Y</guilabel> labels indicate the current
pointer position, with (0,0) being the top left corner of the canvas.</para>
</sect3>

<sect3 id="commands-palettes-controlbox-histogram">
<title><guilabel>Histogram</guilabel></title>

<para>
<screenshot>
<screeninfo>The <guilabel>Histogram</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-histogram.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Histogram</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Histogram</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>This tab displays a color histogram showing the distribution of
colors over the image. The histogram is split up in red, green and blue
levels.</para>
</sect3>

<sect3 id="commands-palettes-controlbox-tool">
<title><guilabel>Tool</guilabel></title>

<para>Actually, there is no tab named like this, since the tab name changes to
reflect the name of the currently selected tool. This tab shows the
customization options available for the tools that have them.</para>

<sect4 id="commands-palettes-controlbox-tool-brush">
<title><guilabel>Brush</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Brush</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-brush.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Brush</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Brush</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>There are three options available on this tab.
</para><para>
The <guilabel>Opacity</guilabel> slider and spin box are used to set the 
opacity when drawing (opacity is the opposite of transparency, i.e. 100%
opaque is 0% transparent, and vice versa).
</para><para>
In the <guilabel>Mode</guilabel> drop down box, you can choose a drawing
mode. This changes the actual effect that results from drawing on the image
(for example, only changing the saturation or lightness).
</para><para>
With the <guilabel>Paint direct</guilabel> option, you can determine whether
you want to paint directly on the current layer, or on a temporary layer which
is then composited onto the actual layer. This makes a difference especially
when using relative low opacity values.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-line">
<title><guilabel>Line</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Line</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-line.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Line</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Line</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>See <link
linkend="commands-palettes-controlbox-tool-brush">Brush</link>
for the description of <guilabel>Opacity</guilabel> and
<guilabel>Mode</guilabel>. The <guilabel>?</guilabel> button shows a tip about
the usage of modifier keys.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-rectangle">
<title><guilabel>Rectangle</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Rectangle</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-rectangle.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The Tool tab for <guilabel>Rectangle</guilabel></phrase>
</textobject>
<caption><para>The Tool tab for <guilabel>Rectangle</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>See <link
linkend="commands-palettes-controlbox-tool-brush">Brush</link> for a description of <guilabel>Opacity</guilabel> and
<guilabel>Mode</guilabel>.
</para><para>
The <guilabel>Fill</guilabel> drop down box is used to specify whether the
inside of the rectangle should be filled. You can choose between three fill
options: the current foreground color, background color or pattern is
used.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-bezier">
<title><guilabel>Bezier</guilabel></title>
<para>See <link
linkend="commands-palettes-controlbox-tool-brush">Brush</link> for the
description of <guilabel>Mode</guilabel> and <guilabel>Opacity</guilabel>.</para>
</sect4>


<sect4 id="commands-palettes-controlbox-tool-ellipse">
<title><guilabel>Ellipse</guilabel></title>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-rectangle">Rectangle</link> are
available here.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-polygon">
<title><guilabel>Polygon</guilabel></title>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-rectangle">Rectangle</link> are
available here.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-polyline">
<title><guilabel>Polyline</guilabel></title>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-line">Line</link>
are available here.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-star">
<title><guilabel>Star</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Star</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-star.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Star</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Star</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The options for <link
linkend="commands-palettes-controlbox-tool-rectangle">Rectangle</link> are
available here, as well as two options specific to this tool.
</para><para>
The <guilabel>Vertices</guilabel> drop down box is used to set the amount
of vertices (points) in the star.
</para><para>
The <guilabel>Ratio</guilabel> setting defines the shape of the
star. A ratio of 0% will create a star with no inner area (when drawing the
star, the two lines that make up a star point, overlap). Increasing the ratio
will slowly make the star more outlined (the two lines are <quote>pulled
apart</quote>). A star with a ratio of 100% is a regular polygon.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-duplicate">
<title><guilabel>Duplicate</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Duplicate</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-duplicate.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Duplicate</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Duplicate</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-line">Line</link>
are available here. In addition, there are three other options.
</para><para>
With the <guilabel>Healing</guilabel> and
<guilabel>Healing radius</guilabel> options, you can specify that the
duplication should not copy the colors, but only the <quote>structure</quote>
of the source area.
</para><para>
If you enable the <guilabel>Correct the perspective</guilabel> option, the
duplicate tool will follow your perspective grid.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-paintwithfilters">
<title><guilabel>Paint with Filters</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Paint with Filters</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-paintwithfilters.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Paint with Filters</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Paint with Filters</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>Depending on the filter, you can set different options here. The
options you can set are the same as those available in the
<quote>normal</quote> settings dialog for the chosen filter. See the
<link linkend="commands-dialogs-filters">Filters section in the Dialogs
chapter</link> for more information.</para> </sect4>

<sect4 id="commands-palettes-controlbox-tool-transform">
<title><guilabel>Transform</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Transform</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-transform.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Transform</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Transform</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<!-- >The <guilabel>Move X</guilabel> and <guilabel>Move Y</guilabel>
spin boxes show, and can be used to set, the displacement of the layer or
selection. The same applies to <guilabel>Scale X</guilabel> and <guilabel>Scale
Y</guilabel> for the scaling of the current layer or selection. Finally, -->
<para>You can choose which transformation algorithm to use in the
<guilabel>Filter</guilabel> drop down box.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-crop">
<title><guilabel>Crop</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Crop</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-crop.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Crop</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Crop</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>Set the corner coordinates of the area that should remain with the
four spin boxes <guilabel>X</guilabel>, <guilabel>Y</guilabel>,
<guilabel>Width</guilabel> and <guilabel>Height</guilabel>. You can also
fill in <guilabel>Ratio</guilabel> to determine the Y/X ratio. Check one of
the checkboxes to have the respective value remain constant while changing the
size of the area. The drop down box can be used to select whether the entire
image or only the current layer should be cropped. Clicking the
<guibutton>Crop</guibutton> button has the same effect as double-clicking
outside the area in the image.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-contiguousfill">
<title><guilabel>Contiguous Fill</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Contiguous Fill</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-contiguousfill.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Contiguous Fill</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Contiguous Fill</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-brush">Brush</link>
are available here, as are a couple of other options.
</para><para>
The setting in the <guilabel>Threshold</guilabel> slider and spin box
determines how near the color of a point should be to the color of the
starting point of the fill, in order for the fill to spread out over the
former point. A higher threshold will therefore fill areas that have less
similar colors, a lower threshold limits the spread.
</para><para>
If you check the <guilabel>Fill entire selection</guilabel> checkbox, the
entire selection will be filled instead of only the neighboring area.
</para><para>
Checking the <guilabel>Limit to current layer</guilabel> checkbox changes the
behavior of the fill: the extent to which the fill is done, is determined from
the current layer only instead of the entire image.
</para><para>
By checking the <guilabel>Use pattern</guilabel> checkbox you can choose to
fill with the currently selected pattern instead of with the foreground color.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-gradient">
<title><guilabel>Gradient</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Gradient</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-gradient.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Gradient</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Gradient</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-brush">Brush</link>
are available here, as are a couple of other options.
</para><para>
The <guilabel>Shape</guilabel> drop down box can be used to select the gradient
type: <guilabel>Linear</guilabel>, <guilabel>Bi-Linear</guilabel>, <guilabel>Radial</guilabel>, 
<guilabel>Square</guilabel>, <guilabel>Conical</guilabel> and <guilabel>Conical Symmetric</guilabel>.
</para><para>
The <guilabel>Repeat</guilabel> option determines whether the gradient is
repeated if it does not fill the entire image. With <guilabel>None</guilabel>, the colors on the
ends of the gradient are used to fill the remaining space. With <guilabel>Forwards</guilabel>, the
gradient is normally repeated (connecting the back end of one occurrence with
the front end of the next). With <guilabel>Alternating</guilabel>, the gradient is repeated with
every second occurrence being drawn from back to front (linking front to front
and back to back).
</para><para>
Check the <guilabel>Reverse</guilabel> checkbox to have the gradient drawn
reversed (from back to front).
</para><para>
The final setting is <guilabel>Anti-alias threshold</guilabel>, which
determines how smooth the gradient will become.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-text">
<title><guilabel>Text</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Text</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-text.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Text</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Text</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The same options as for <link
linkend="commands-palettes-controlbox-tool-brush">Brush</link>
are available here. Furthermore there is an option <guilabel>Font</guilabel>,
which shows the font that will be used for the text. Click the
<guibutton>...</guibutton> button to change the font.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-colorpicker">
<title><guilabel>Color Picker</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Color Picker</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-colorpicker.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Color Picker</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Color Picker</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The first option is a dropdown box in which you can choose which
layer to pick the color from. If you choose a specific layer,
the color of the point in that layer will be retrieved. With <guilabel>Sample
All Visible Layers</guilabel>, the topmost visible layer which is not
transparent at that point is used.
</para><para>
If the <guilabel>Update current color</guilabel> checkbox is checked, then the
current foreground color (when clicking with the &LMB;) or background color
(when clicking with the &RMB;) is set to the picked color.
</para><para>
The checkbox <guilabel>Add to palette</guilabel> and the accompanying
dropdown box determine whether the picked color should be added to an existing
palette. Check the checkbox, and choose the desired palette from the list, if
you want to do so.
</para><para>
The checkbox <guilabel>Show colors as percentages</guilabel> switches the
range of color values displayed from the <quote>normal</quote> range (e.g. 0 to
255) to a scaled value between 0% and 100%.
</para><para>
With the <guilabel>Sample radius</guilabel> option, you can choose the area
size to use when picking the color. A radius of one just picks one pixel,
larger radii will make the picker average over the colors of the circle-shaped
area with the chosen radius that is centered around the chosen pixel.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-select">
<title><guilabel>Select</guilabel> tools</title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Select</guilabel> tools</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-select.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Select</guilabel> tools</phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Select</guilabel> tools</para></caption>
</mediaobject>
</screenshot>
</para>
<para>The <guilabel>Paint Selection</guilabel>, <guilabel>Erase Selection</guilabel>,
<guilabel>Select Rectangular</guilabel>, <guilabel>Select Elliptical</guilabel>, <guilabel>Select Polygonal</guilabel> and <guilabel>Select Outline</guilabel> tools have one option:
the <guilabel>Action</guilabel> to perform. You can choose between <guilabel>Add</guilabel> to, or
<guilabel>Subtract</guilabel> from the selection.</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-selectcontiguous">
<title><guilabel>Select Contiguous Area</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Select Contiguous</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-selectcontiguous.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Select Contiguous</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Select Contiguous</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The <guilabel>Action</guilabel> is the same as discussed with the
<link linkend="commands-palettes-controlbox-tool-select">Select
operations</link>.
</para><para>
The slider and spin box at <guilabel>Fuzziness</guilabel> determine how near
colors must be to the color at the clicked point to be added to the selection.
</para><para>
When the <guilabel>Sample merged</guilabel> checkbox is checked, the
bounds of the selection are determined by looking at the entire image instead
of at the current layer.
</para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-selectsimilar">
<title><guilabel>Similar Select</guilabel></title>
<para>The <guilabel>Action</guilabel> and <guilabel>Fuzziness</guilabel> 
options are the same as with <link
linkend="commands-palettes-controlbox-tool-selectcontiguous">Select
contiguous</link>. </para>
</sect4>

<sect4 id="commands-palettes-controlbox-tool-selectmagnetic">
<title><guilabel>Select Magnetic</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Tool</guilabel> tab for <guilabel>Select Magnetic</guilabel></screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-controlbox-selectmagnetic.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Tool</guilabel> tab for <guilabel>Select Magnetic</guilabel></phrase>
</textobject>
<caption><para>The <guilabel>Tool</guilabel> tab for <guilabel>Select Magnetic</guilabel></para></caption>
</mediaobject>
</screenshot>
</para>
<para>The <guilabel>Action</guilabel> option is the same as with the other
<link linkend="commands-palettes-controlbox-tool-select">Select tools</link>.
</para>
<para>
The <guilabel>Distance</guilabel> option determines the maximal distance at
which boundaries to attach to, are searched for. The <guibutton>To
Selection</guibutton> button has the same effect as double-clicking the &LMB;:
the selection is finished.
</para>
</sect4>

</sect3>

</sect2>

<sect2 id="commands-palettes-colors">
<title>The <guilabel>Colors</guilabel> palette</title>
<para>In this palette you can choose the foreground and background colors
that should be used for painting. You can choose these in five different
ways. Each of these has its own tab on this palette.
</para><para>
You can choose which color to set by clicking the corresponding
buttons at the top left. The topmost color is the foreground color, the
bottom one is the background color. You can click the double-headed arrow
to swap the colors: foreground color becomes background color and vice
versa. You can reset the colors to the default (foreground black, background
white) by clicking the small black/white icon.
</para>

<sect3 id="commands-palettes-colors-hsv">
<title><guilabel>HSV</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>HSV</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-colors-hsv.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>HSV</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>HSV</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>On this tab, you can select a color via the Hue / Saturation / Value
system.
</para><para>
The hue determines the major color and starts at red with 0, then increases
along the color spectrum (that is, along the <quote>line</quote> yellow, green,
blue, violet) to a maximum of 359. This is represented in the circle on the tab
as the angle component (starting at the top, rotate along the circle
in clockwise direction to increase the hue).
</para><para>
The saturation determines the pureness of the color. A saturation of 255
yields the pure color, while a saturation of 0 yields a gray. This is the
radius component of the color circle on the tab: the center corresponds to
no saturation, the circle boundary corresponds to fully saturated.
</para><para>
The value determines the lightness of the color. This darkens or lightens the
color, as can be set using the vertical slider on the tab. A value of 0 gives
black, a value of 255 gives the pure color.
</para>
</sect3>

<sect3 id="commands-palettes-colors-rgb">
<title><guilabel>RGB</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>RGB</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-colors-rgb.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>RGB</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>RGB</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>On this tab, colors can be selected using their Red / Green / Blue
components.
</para><para>
You can set red, green and blue components on a scale of 0 to 255. At 0 that
color component is absent, at 255 it is used at maximum intensity. The sliders
will change color to give you a hint about which color you will produce by
altering the corresponding value.
</para>
</sect3>

<sect3 id="commands-palettes-colors-gray">
<title><guilabel>Gray</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Gray</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-colors-gray.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Gray</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Gray</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>On this tab, you can choose a gray value (indicated with a K for Key,
the usual designation for black).</para>
<para>The gray value can be chosen on a scale from 0 (pure white) to 255
(pure black).</para>
</sect3>

<sect3 id="commands-palettes-colors-palettes">
<title><guilabel>Palettes</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Palettes</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-colors-palettes.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Palettes</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Palettes</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>On this tab, you can select a color from one of several predefined
color palettes.</para>
<para>You can choose which color palette to pick from in the drop down
box at the top.</para>
</sect3>

<sect3 id="commands-palettes-colors-watercolors">
<title><guilabel>Watercolors</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Watercolors</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-colors-watercolors.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Watercolors</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Watercolors</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>This tab offers you a selection of watercolors for painting with <quote>wet
paint</quote>.
</para><para>
You can set two options to modify the painting behaviour: <guilabel>Paint
strength</guilabel> influences how much paint you will apply to the canvas,
and <guilabel>Wetness</guilabel> determines how wet the paint is when it is
applied. You can dry the paint later.
</para>
</sect3>

</sect2>

<sect2 id="commands-palettes-layers">
<title>The <guilabel>Layers</guilabel> palette</title>
<para>This palette offers two tabs.</para>

<sect3 id="commands-palettes-layers-layers">
<title><guilabel>Layers</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Layers</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-layers-layers.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Layers</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Layers</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>This tab offers you access to various operations on layers.
</para><para>
On the top left, you can select what blending mode should be used for the
selected layer. These are the same possibilities as you can choose from for
drawing modes.
</para><para>
The slider/textbox at the top right determines the opacity of the selected
layer. 0% opacity corresponds to 100% transparency, and vice versa.
</para><para>
The list shows all layers and their names, and offers various controls for each
layer. The eye icon toggles whether the layer is visible or not. The link icon
is used to link layers together. The lock icon determines if the layer is
locked or not. Locked layers cannot be edited.
</para><para>
Below the layer list, there are some other controls. You can create a new
layer, move the current layer up or down, show the layer's properties and
delete it.
</para>
<para>
There are some more handy tricks you can do with the mouse within the list.
Right-click on the layer list and select <guilabel>New Folder</guilabel> to
create a new layer folder, which you can use to group layers in. You can also
drag and drop layers to change their order. To do so, click on the bottom part
of the list item representing the layer, drag the mouse, and release the mouse
button at the desired position. If you click at the top part of the list item
instead, you will get a text field so that you can rename the layer.
</para>
</sect3>

<sect3 id="commands-palettes-layers-scriptsmanager">
<title><guilabel>Scripts Manager</guilabel></title>
<para>
<screenshot>
<screeninfo>The <guilabel>Script Manager</guilabel> tab</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="palettes-layers-scriptsmanager.png" format="PNG" />
</imageobject>
<textobject>
<phrase>The <guilabel>Script Manager</guilabel> tab</phrase>
</textobject>
<caption><para>The <guilabel>Script Manager</guilabel> tab</para></caption>
</mediaobject>
</screenshot>
</para>
<para>This tab is a smaller version of the <guilabel>Script
Manager</guilabel> dialog. See the description over there for more
information.
</para>
</sect3>

</sect2>

</sect1>
