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132 lines
6.9 KiB
132 lines
6.9 KiB
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0" />
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<title>Photopea - Selections</title>
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<a href="index.html" class="title">Learn Photopea</a>
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<h3>Topics</h3>
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<ul>
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<li class="lvl0"><a href="index.html">Introduction</a></li>
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<li class="lvl0"><a href="workspace.html">Workspace</a></li>
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<li class="lvl1"><a href="opening-saving.html">Open and Save</a></li>
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<li class="lvl1"><a href="image-size.html">Image size</a></li>
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<li class="lvl0"><a href="layers.html">Layers</a></li>
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<li class="lvl1"><a href="masks.html">Masks</a></li>
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<li class="lvl1"><a href="layer-styles.html">Layer Styles</a></li>
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<li class="lvl1"><a href="smart-objects.html">Smart Objects</a></li>
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<li class="lvl1"><a href="other-layers.html">Other Layers</a></li>
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<li class="lvl0"><a href="layer-manipulation.html">Layer Editing</a></li>
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<li class="lvl1"><a href="free-transform.html">Free Transform</a></li>
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<li class="lvl1"><a href="adjustments-filters.html">Adjust. & Filters</a></li>
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<li class="lvl0 active"><a href="selections.html">Selections</a></li>
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<li class="lvl1"><a href="creating-selections.html">Make Selections</a></li>
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<li class="lvl1"><a href="advanced-selecting.html">Advanced Selecting</a></li>
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<li class="lvl1"><a href="refine-edge.html">Refine Edge</a></li>
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<li class="lvl1"><a href="moving-selected-data.html">Move Selected Data</a></li>
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<li class="lvl0"><a href="brush-tools.html">Brush Tools</a></li>
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<li class="lvl1"><a href="bt-basic.html">Basic Tools</a></li>
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<li class="lvl1"><a href="vg-structure.html">The Structure</a></li>
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<li class="lvl1"><a href="vg-manipulation.html">Editing Shapes</a></li>
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<li class="lvl1"><a href="vg-creating.html">Creating Shapes</a></li>
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<li class="lvl0"><a href="other.html">Other</a></li>
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<li class="lvl1"><a href="guides-grid-snapping.html">Guides & Snapping</a></li>
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<li class="lvl1"><a href="animations.html">Animations</a></li>
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<div id="content" style="width:78%;">
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<div class="post">
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<h1>Selections</h1>
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<p>In this part, we will focus at regular layers with raster images (pixel data).
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There are many tools to edit pixel data (Brush, Eraser, adjustments, filters). But we often don't want to edit the whole layer, but just some part of it.</p>
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<p>The selection defines a set of pixels, that are "selected" and can be edited by tools. Precisely, it is a "map" over the whole image,
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which gives each pixel the value between 0 % and 100 %. This value says, how much color of the pixel can be changed, and how much should be preserved.
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Selections are not bound to layers (as masks), but there is just one selection for the whole document, which is used for every layer that you work with.</p>
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<p>For example, Photopea has the Fill operation (Edit - Fill). By default, it will fill the whole layer with a foreground color.
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Once you have a selection, it will fill only the selected area with that color.</p>
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<p>While masks are visualized with the white and the black color (in their thumbnails), selections are visualized
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right in the main area of the document with the <b>contour</b>, that is drawn between selected and unselected areas.
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We can say, that operations are applied <b>inside</b> the selection, and not outside of it.
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Here you can see an example of the selection, and the result, when you draw on top of it with a Brush tool.</p>
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<img src="https://i.imgur.com/VHtRoMU.png" />
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<h2>Working with Selections</h2>
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<p>Once you have a selection, there are several basic operations for changing it.
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The basic operation is <b>inverting</b> the selection - it will select unselected pixels and unselect selected pixels (available in Select - Inverse).
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You can <b>expand</b> the selection by several pixels
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(i.e. add pixels close to the selection into the selection), <b>contract</b> it by several pixels (the opposite operation to expanding),
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or <b>feather</b> - apply a blur to the selection, to make a smooth transition between 0 % areas and 100 % areas.
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All this is available at Select - Modify - Expand / Contract / Feather.</p>
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<p>Selected pixels can be Cut, Copied or Pasted (Edit - Cut / Copy / Paste, or Ctrl + X / C / V). This even works between different documents.</p>
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<p>Deselection (removing the selection) is possible through Select - Deselect (or Ctrl + D).</p>
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<h2 style="margin-top: 4em">Comments</h2>
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