In Preferences | User Interface | Editor | Other, I checked Display Line Numbers and set Interval to All. However, I still have no line numbers in my text editor window.
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There is a second preference you need to set to get line numbers: Preferences | Window Types | SQL Window | Show gutter (line numbers).
8
Right click in the area where you would expect line numbers, and select Toggle Line Numbers

PT_C
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2I don't see any such menu option when right-clicking the gutter, in PL/SQL Developer 10.0.5.1710. – Jun 01 '15 at 16:54
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preferences--user interface--"show line number" then Right click the area of sql window and select "gutter" ,done!

任戰玉
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