> I have trouble sometimes modifying the selection -- the new selection
> the old instead of modifying it. Also, the selection marks become
> -- using the modifier keys or the selection mode menu, and using any
> of the
> selection tools -- doesn't help
> -- selection should be visible according to view menu, but it isn't
> -- the only way I can get back to normal is save and restart gimp
> Either I've entered some select-unfriendly mode, or there's a bug.
> gimp version 2.6, Ubuntu.
Make sure you have the tool options available
. pick your select tool
. note in the Tool Options, Mode
So make your selection
then modify using the mode options
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