Gifs transparency (again)

I know we have had much discussion about gif transparency over the last
months, but I keep running into the same problem with PS5 (PC format), so
wondering if you guys have any suggestions.

Quite a long time ago I used to be able to find a gif file in public domain
image sites or in my image collections, then make a small change such as
rotating or resizing and export again as a transparent gif.  For some reason
this isn't working any more.

Now when I open a gif file into PS5 and do any changes with it, I have to
literally do a "cut-out" selection and put it on a new transparent
background in order to make any changes and keep a transparent setting.  I
don't understand why I can't make changes to a gif file and then export it
to transparent once again.  It seems to lose all transparency after I make
any changes.  I have tried both interlaced and non-interlaced with no luck.

Any suggestions?

I also have PSP5, but I really don't know how to use it yet.  Maybe this has
an easier way to do this?

Thanks in advance,
Lonna

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