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Layers and Masks 147<br />
While working on the layer, you can switch back and forth between the bitmap,<br />
depth map, and (optional) mask by clicking the appropriate thumbnail. You can<br />
also switch the depth map off and on to assess its contribution to the image, or<br />
subtract it for creative reasons.<br />
To switch the depth map off and on:<br />
• Shift-click its preview thumbnail, next to the layer name. When<br />
the depth map is switched off a red ‘X’ appears across the<br />
thumbnail.<br />
Importing a depth map<br />
Another way of incorporating a depth map is to create a suitable bitmap image<br />
separately (or borrow one from somewhere else) and then paste it via the<br />
Clipboard to an existing <strong>PhotoPlus</strong> depth map.<br />
To import a depth map image:<br />
1. Open a bitmap file in <strong>PhotoPlus</strong> and copy it to the Clipboard.<br />
2. In the target <strong>PhotoPlus</strong> image, create a depth map or click an existing layer's<br />
Depth Map thumbnail.<br />
3. Choose Select>Select All to select the whole depth map, then choose<br />
Edit>Paste Into Selection.<br />
The Clipboard contents are pasted in greyscale onto the depth map.<br />
It's a good idea to match the dimensions of the image you're pasting to the<br />
dimensions of the target <strong>PhotoPlus</strong> image.