If a script was edited on the right-hand monitor of two-monitor Mac setup and the file was saved that way, then opened on a computer with only one monitor, Final Draft will attempt to open it on a right-hand monitor that doesn't exist. Go to Window > Zoom to bring the script back to the main (left-hand) monitor).
Has the background or text color been changed? Go to Document > Page Layout > Colors. If the background color and the text color are the same, you won't be able to see the text. Change the colors (default is white background and black text).
Check the scaling (zoom) under the View menu. If the scaling is set very high (such as 250%) you might be looking at a closeup of the side of a page. Reduce the zoom to 100%.
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