====== GraphicsMagick Alpha Channel ======

[[:tools:graphicsmagick|PMC Editing Wiki: Tools GraphicsMagick]]

**2021-12-25**

**Add** alpha channel:
<code dos>
gm convert source.png -matte destination.png
</code>

**Remove** alpha channel:
<code dos>
gm convert source.png +matte destination.png
</code>

Yes negative and positive, really confuses, why not add negative**MATTE** to remove it heh. Oh well what can you do ;)