This is the second post as I have not seen the intial post appear.
I have a file in latest ver PS which is an Acrobat file. I have encountred a few issues. The image is of a wiring diagram for electrcial circuit.
1) 99% of the boxes are transparent. A couple of the boxes are filled with ?
2) Started out being able to fill the transparent boxes with color using the rectangle box and fill. However did not realize the boxes were not transparent and using the above process would cover the area completely. I must have triggered something bc when I went to another transparent box I was not able to replicate previous step in rectangle/fill. However developed a workaround by selecting the box and creating a new layer. Once I filled the box on the original drawing with color, I could then copt and paste the newly created layer over the color filled layer.
3) The boxes with the filled (?) stated above cannot be converted to transparent where the white pixels are showing.