How to make PyCharm always show line numbers

Question

I cannot seem to be able to find the setting to enable line numbers for all files, but I have to always right click and enable this on per file basis.

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Answer 1

For version 2.6 and up, the dialog is in the "Preferences" dialog, access using Cmd ',':

PyCharm (far left menu) -> Preferences... -> Editor (bottom left section) -> Appearance -> Show line numbers checkbox