[Gimp-user] PNG and transparency

[Johannes Reese]

Hi all,

what determines if pressing the wipe-out button or pressing CTRL-x 
extinguishes to either the background color or to transparency? I thought the 
type of file would. But some png-files I opened behaved so that CTRL-x of a 
selected area makes the deleted stuff transparent (which I want), while with 
others all I can reach is substituting the selected area by the background 
color. How can I force those files to delete to transparency?

Regards,

Johannes
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[Gimp-user] Changing colors

[Johannes Reese]

How can one change colors in a picture. I have found only a command to change 
color to transparency?

Regards

Johannes
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