Saving and Exporting Files > Exporting bitmap images > Defining transparency |
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Defining transparency
Use a background layer to define custom areas of transparency on graphics exported as bitmap images with alpha channels.
To define a custom transparency:
1 |
Create a graphic. |
2 |
On a background layer, draw the desired mask. |
Use only black, white, or grays for masking. White areas in the background layer appear opaque in the resulting bitmap, while black areas appear transparent. Grays or Gradient fills appear transparent with lighter grays appearing more opaque and darker grays appearing more transparent. Because a background layer does not print, defining an alpha channel this way does not affect printing of the document.
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To export the transparency as an alpha channel, see Working with alpha channels. |
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