First off, I am in RGB mode, with Photoshop Elements 6. I am trying to fill in an area of the business center (the building on the left) in my drawing but it is going over both the door lines and the text on the building. With the student center (the building on the right), it does the same with any of the grey lines (but not the text). And this is all under one layer (They used to be made up of multiple layers but were merged into one). What should I do? Here is a picture of it down below:
Use the magic wand with contiguous turned on and a tolerance setting that excludes the gray area to make your selection, then use Edit>Fill Selection.