I learned something new about gretl's interface even after all these
years by looking in the help menu at the keyboard shortcuts page. (I'm
not entirely sure it has to be a PDF page with lots of whitespace
margins, but that's not the point right now.)
'h' (open command reference) seems to outdated or broken at least on
Windows. Instead the menu indicates ctrl-H which works alright, although
it's actually ctrl-h (lowercase). Should the shortcuts help page be updated?