Some observations from a non-expert.
• Fast and responsive application. Very important, and excellent. Me like.
• The lines showing matching tabs are a great help, and it is wisely Tufte-esque that they are faint but visible. But even better would be for the colours to rotate: 0 mod 3 the current pale grey; 1 mod 3 big very faint green; 2 mod 3 very faint red.
• Weird colouring bug.
• Could PostScript be one of the standard languages? My PostScript program is used by deeply non-technical people.
"]A code editor, a good text editor, is a boon, and it should be one that understands PostScript. On a Mac Alpha X is excellent and free, and Aquamacs Emacs is suitable for Emacs experts. On a PC NotePad++ is good. The basic text editor that came pre-installed on your computer will make life harder than it needs to be. A code editor that understands PostScript will prevent many errors and save much labour.Alpha is good, but hasn’t been updated since 2008, and its interaction with the latest OS rather frays at the edges. If Sublime coped with .ps by default — surely not difficult to do — then it could be new recommendation. But presumably this aspiration is blocked by “Jon Skinner … is not responding to community”.
But the first post-installation taste is good. Thank you again for installation help.