> I have a small gif that has a picture in the middle, with an irregular
> black border around it. How do I set the black border to be transparent?
1 <Image> /image/mode/RGB
2 /image/alpha/add alpha channel
3 then you select the black border, for example
a Either with "fuzzy select" (selects similar pixels, you can set it in
the tool properties(doubleclick on the tool icon) even to 0 , then it
selects only pixels with for example the color #000000)
b Or with select by color (similar properties, you will see)
4 If it's selected, you cut it - it becomes transparent.
5 <Image> /image/mode/indexed
6 save as gif
I hope it helps Hago