I have no idea what a "
threshold" is, but if you export a background (or other
image) from your Captivate project to your image editor and make
changes to it, so long as you don't change the size (specifically,
to a larger size) you should have no problem at all in bringing
that image back into the project, either as a background, or as an
image.
Does that help at all?? If not, please state what version you
are using, and in a step-by-step fashion, tell us exactly
(1) what you are doing,
(2) what you are seeing as a result, and
(3) what you
expected
to see as a result. Thanks!
.