<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" type="topic" id="gthumb-edit-rotate" lang="zh_CN">
  <info>
    <link type="guide" xref="index#editing"/>
  </info>
  <title>Rotations and Flips</title>

  <p><media type="image" mime="image/png" src="figures/palette.png"/>
  To access the editing tools, open an image and then click the 
  <gui>Edit File</gui> toolbar button (the palette icon).</p>

  <p>Several tools are provided to manipulate the orientation of
  images.</p>

  <terms>
    <item>
      <title><gui>Mirror</gui></title>
      <p>This flips the image horizontally. The left and right sides
      are swapped.</p>
    </item>
    <item>
      <title><gui>Flip</gui></title>
      <p>This flips the image vertically. The top and bottom
      are swapped.</p>
    </item>
    <item>
      <title><gui>Rotate Right</gui></title>
      <p>This rotates the image clockwise.</p>
    </item>
    <item>
      <title><gui>Rotate Left</gui></title>
      <p>This rotates the image counter-clockwise.</p>
    </item>
  </terms>

  <p>The rotations offered in the edit mode act on the image in memory.
  They are not direct file operations. For jpeg images, these means they
  are not lossless operations - the image will degrade slightly when it
  it is re-encoded and saved. However, <app>gThumb</app> does provide
  lossless rotation tools. See <link xref="gthumb-batch-rotate"/>.</p>

</page>
