How can I make transparency stick?

[Graham Samuel]

First, thanks to Klaus and Ken for the very quick replies to my recent question about sounds. Now for another newbie query:

I have some graphics (technically, images) with white backgrounds which I want to make transparent. As far as I understand the documentation, this should happen if I uncheck the 'Opaque' box in the grc's Properties palette. This doesn't seem to work - firstly the white bits just stay (solid) white and secondly when I click on the object again, the 'Opaque' box is checked again. I can't seem to be able to tell the object that I want its properties permanently changed - there is of course no 'apply' button, but I guess 'enter' or just changing focus should do it. What now? Do I have to convert all these types of grc to transparent GIFs - it doesn't seem to be what the Transcript Dictionary is suggesting.

Another approach might be to set the object's Ink property, but this doesn't seem to appear in the Properties palette at all. An attempt to set this via the Message Box doesn't do anything either.

TIA to anyone who can unconfuse me.


Graham
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Graham Samuel / The Living Fossil Co. / UK & France
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