How to edit gif files created in Photoshop for website design and downloaded into Dreamweaver

Hi,

Image spacers and sliced images = very old layout - in an ideal world you would create a complete new website.

It could also be  the original layout was created, sliced up and exported from Adobe Fireworks (formerly Macromedia Fireworks) ? If you have a bunch a files within the project look for some .PNGs, possibly ending .fw.png these would be your editable Adobe Fireworks files

If you don't have the original editable Photoshop or Fireworks file(s) then you've got a job on your hands and even then I'd say its just not worth it given the layout sounds like its been sliced up and exported to html from either Fireworks or ImageReady (Photoshop).

I agree with melissapiccone  Image Ready slices and spacer GIFs are a throwback to the late 90's.  It was a quick way for non-coders to build a mockup site.  But it was never a good approach to building real websites.  The code is invalid and the table based layouts were too rigid and unstable for production use.  Editing content usually introduced unslightly gaps and broken images. 

Fast forward to 2019 and that approach is unthinkable.   Site owners expect RWD (responsive web designs) that fit ALL devices.  You cannot do that with table layouts and spacer GIFs.   Discard everything and start over with Bootstrap or another RWD framework of your choice.

Dreamweaver has starter templates to help you.  Go to File > New > Starter Templates.   See screenshot.

You would definitely need the original art to make changes without losing your mind.

Sliced/table layouts were abandoned years back, partially for this reason.

Sliced images require the original art in order to make edits (in the original program) and re-slice on the same guides. Without doing that, the EXTREMELY rigid and fragile table structure created by Photoshop/ImageReady would break instantly after adding a new image that was off by a pixel or two on either axis.

Without the original art, your only real option is to start over using more modern techniques.

Just to add what I posted before, I believe the website layout was created in Image Ready.