Once I place a rollover image in a webpage, how can I go back and modify the rollover image?
DW can't modify a rollover image. You need to modify images in your graphics app. That's one of the big drawbacks to using images for menus or anything else that is likely to change during the life of your site.
For these and other reasons, I use CSS styled lists for navigation.
CSS Horizontal Drop Menu
is there a way to "copy" a rollover image from one webpage document to another and retain the functionality?
Or just use File > SaveAs > New-file-name.html.
See also -
Guidance on when to use DW Templates, Library Items and SSIs -
Um, no...I didn't mean how do I edit the actual individual file itself. I would use Adobe Photoshop for that.
No, I meant, say for instance, I add a Rollover Image with one file as my original image, then choose a different file for my Rollover image. Now what if I want to change just the Rollover Image?
Thanks for the second answer...I think the idea was to avoid having to work with any code and see if there was a way to do it by dragging a certain way. Guess not.
A belated thanks, Nancy. I used your suggested technique this evening and appreciate your answer.