I have Octave installed on Linux Mint 18.3, Dell P690 Workstation with 16Gb ram and two dual core Xeon 5160 processors. (big chunk of iron but I love it).
I am unable to change the default editor to Geany from the Edit/Preferences/Editor/Use custom file editor dialog.
I am a newbie with Octave so I've probably missed the proper configuration.
Thanks