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<title>2.2. Using the Layerdialog</title>
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<tr>
<th colspan="3" align="center" id="chaptername">2.2. Using the Layerdialog</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="ch04s02.html">Prev</a> </td>
<th width="60%" align="center" id="sectionname">2.2. Using the Layerdialog</th>
<td width="20%" align="right"> <a accesskey="n" href="ch04s02s03.html">Next</a></td>
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<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="id3333822"></a>2.2. Using the Layerdialog</h3>
</div>
</div>
</div>
<div class="variablelist">
<dl>
<dt>
<span class="term">Overview</span>
</dt>
<dd>
<p>
Every layer appears in the dialog in form of a thumbnail. When
an image has many layers as components then it appears like a
list. The upper layer in the list is the first one visible and
the lowest layer the last visible, the background. Above the
list one can find characteristics related individually to each
layer. Under the list one can find managements buttons for the
layer list. A right-click in a layer thumbnail opens the layer
<a href="ch05s07.html" title="7. Layers">menu</a>.
</p>
</dd>
<dt>
<span class="term">Layer attributes</span>
</dt>
<dd>
<p>
Every layer is shown in the list with its own attributes. The
main attribute is the name of the layer itself. You can edit it
by a double-click on the name or the thumbnail of the layer. In
front of the thumbnail is an icon showing an eye
<span class="guiicon">
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-eye.png" /></span>
</span>. By clicking on the eye, you toggle whether the layer is
visible or not. (Shift-clicking on the eye causes all
<span class="emphasis"><em>other</em></span> to be temporarily hidden.) An
other icon showing a chain <span class="guiicon">
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-vchain.png" /></span>
</span> enables to group layers for operations on multiples
layers (for example with the Move tool).
</p>
<div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Tip">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Tip]" src="../images/tip.png" />
</td>
<th align="left">Tip</th>
</tr>
<tr>
<td colspan="2" align="left" valign="top">
<p>
In case of an animation layer GIF or MNG the name of the
layer can be used to specify some parameters : Layer_name
(delay in ms) (combination mode), for example Frame-1 (100
ms) (replace). The <span class="guilabel">delay</span> set the time
during the layer is visible in the animation. The combination
mode set if you combine with the previous layer or replace
it: the two modes are (combine) or (replace).
</p>
</td>
</tr>
</table>
</div>
</dd>
<dt>
<span class="term">Layers characteristics</span>
</dt>
<dd>
<p>
Above the layer list it's possible to specify some properties for
the active layer. The active layer is the one highlighted in blue. The
properties are : "Layer mode", "Keep transparency", and "Opacity".
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<div class="mediaobject">
<img src="../images/dialogs/dialogs-layer-modes.png" />
</div>
<p>
<span class="guilabel">Layer modes</span>:
The layer mode determines how the layer interact with the
other layers. From the combo box you can access to all the
mode provided by Gimp. The layer modes are full detailled
in the <a href="go01.html#glossary-modes">Glossary</a>.
</p>
</li>
<li>
<div class="mediaobject">
<img src="../images/dialogs/dialogs-layer-keeptrans.png" />
</div>
<p>
<span class="guilabel">Keep transparency</span>: If you check this
option the transparent areas of the layer will be keeped,
this even if you have checked the <span class="guilabel">Fill
transparent areas</span> option for the Bucket fill
tool.
</p>
</li>
<li>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-layer-opacity.png" /></span>
</p>
<p>
<span class="guilabel"><a id="gimp-layer-dialog-opacity-scale"></a>Opacity</span>:
By moving the slider you give less or more opacity to the
layer. With a 0 opacity value the layer is transparent and
full invisible. Don't mistake with the Layer mask (see
chapter Layer mask) that sets the transparency pixel by
pixel.
</p>
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">Layer management</span>
</dt>
<dd>
<p>
Under the layer list a set of buttons allows you to perform
some basis operations on the layer list.
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-edit.png" /></span>
<span class="guilabel">Edit layer attributs</span>:
You can change here the name of the active layer in the list.
</p>
</li>
<li>
<a id="gimp-layer-new"></a>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-new.png" /></span>
<span class="guilabel">New layer</span>:
You can create here a new layer. A dialog is opened where
you have to fill the <span class="guilabel">Layer name</span>,
perhaps change default <span class="guilabel">Height</span> and
<span class="guilabel">Width</span> choose the <span class="guilabel">Layer fill
type</span> which will be the new layer background.
</p>
</li>
<li>
<a id="gimp-layer-raise"></a>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-raise.png" /></span>
<span class="guilabel">Raise layer</span>:
You can here put the layer up a level in the list. Press the
<span><b class="keycap">Shift</b></span> key to move the layer to the top of
the list.
</p>
</li>
<li>
<a id="gimp-layer-lower"></a>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-lower.png" /></span>
<span class="guilabel">Lower layer</span>:
You can here put the layer down a level in the list. Press the
<span><b class="keycap">Shift</b></span> key to move the layer to the bottom of
the list.
</p>
<div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Tip">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Tip]" src="../images/tip.png" />
</td>
<th align="left">Tip</th>
</tr>
<tr>
<td colspan="2" align="left" valign="top">
<p>
To move a layer at the bottom of the list, first
give a transparency channel to the Backgrpund layer
(also called Alpha channel). Right click on the
Background layer and select <span class="guilabel">Add Alpha
channel</span> in the menu.
</p>
</td>
</tr>
</table>
</div>
<p>
</p>
</li>
<li>
<a id="gimp-layer-duplicate"></a>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-duplicate.png" /></span>
<span class="guilabel">Duplicate layer</span>:
You can create here a copy of the active layer. Name of new
layer is suffixed with a number.
</p>
</li>
<li>
<a id="gimp-layer-anchor"></a>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-anchor.png" /></span>
<span class="guilabel">Anchor layer</span>:
When the active layer is a temporary layer (also called floating
selection) shown by this icon
<span class="guiicon">
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-floating.png" /></span>
</span>,
this button anchors it in the previous active layer.
</p>
</li>
<li>
<a id="gimp-layer-delete"></a>
<p>
<span class="inlinemediaobject"><img src="../images/dialogs/dialogs-icon-delete.png" /></span>
<span class="guilabel">Delete layer</span> :
You can here delete the active layer.
</p>
</li>
</ul>
</div>
</dd>
</dl>
</div>
</div>
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<hr />
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<a accesskey="u" href="ch04s02.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="ch04s02s03.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">2. Layers dialog </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> 2.3. Layer masks</td>
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