Sorry, I was a little too brief in my question.
Linux Agi Studio comes with a program much like MSDOS Picedit. This picture editor creates picture resources of 160x168, but this is enlarged for easier editing, and there are also several widgets alongside that make the overall dimensions of this picture editor's window too big for my screen. This makes the program very difficult to use.
I am wondering if perhaps there might be another Linux port of MSDOS Picedit or the source code available for Picedit. I have a couple more options, but these would not be easy fixes.