I have a couple duplicate monitors. They are both Dell and exactly the same model, year, etc.
And, I have them both set on exactly the same resolution, 1280 x 1024. However my right monitor (#3) fills up the entire screen while my left monitor (#2) is leaving black blank areas at the top and bottom AND cuts off a portion of the left and right side of windows that I have maximized. This even happens with my desktop wall paper.
This just started happening. I guess after I updated something. Don't remember what.
Here are some screenshots to help explain. I need the left monitor (#2) to fill up the monitor space as #3 does.