Brightness/Contrast...

 

Changes the brightness and contrast of the alpha channel.

Settings

Brightness

Sets the "brightness" of the alpha channel.
Range from -100% to 100%, default 0% means no change in brightness.
Higher values mean more opaque, lower values mean more transparent.

Opaque

Change the contrast of the alpha channel.
Range from -100% to 100%, default 0% means no change in contrast.
-100% contrast means the entire alpha channel has the same transparency, 100% means pixels are either fully opaque or transparent.

AlphaToys v1.0 manual - Copyright © 2009 VanDerLee. All rights reserved.