I see similar hints in Rider by default when hovering over function names:
You can summon rendered docs when the cursor is inside
map if you press F1 (Mac) or Ctrl+Q (Windows) or choose View → Quick Documentation:
I use IdeaVim and bind “Quick Documentation” to gh (for “get help”) so I can bring that up without moving the mouse. (You can configure IdeaVim via an
.ideavimrc. Here’s the line in my config to show the doc popup.)
Rider also gives docs for the highlighted suggestion in a list. The right-hand panel here appears after a delay of 1000ms by default, which you can change at Editor → General → Code Completion → “Show the documentation popup in x ms”:
I don’t think there’s an equivalent to the info panel, though — that does look really useful. I use Dash or Zeal to summon quick docs for other languages (Dash has Rider/IntelliJ integration), but I haven’t found up to date Dash-compatible docs for F# yet.
As a workaround you can just type the namespace/module name up to the dot, then see suggestions for all methods in that namespace, with popup docs for each: