Operators Dialog

10.4 - Operator Details

10.4.1 - Alpha Modify

You can set the level of the alpha channel (transparency) in the area selection you've made in the image using this operator's Amount

A value of 0 00 results in complete transparency. A value of 255 FF results in complete opacity.

Tip: Although the values here are from 0 to 255, they are modified into the 16-bit domain when they are applied. 01 becomes 0101, 99 becomes 9999, FE becomes FEFE and so on.
Warning: Only the PNG and iToolBox image formats save transparency. Save in .png or an iToolBox format (.elx or .ato) for anything that uses transparency, or the image's transparency information will be lost. In addition, .png output, which is intended to be a web-compatible format, only saves 8 bits of transparency information, while the iToolBox formats save all 16 bits.

The alpha modify operator
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