I've been postponing doing the this tutorial for nearly two years, some of these "TIL" are not really TILs, but more of a "I saw once, thought it was cool, and the promptly forgot".

• in normal mode
  • press A to move to insert mode at the end of the current line (I've been doing $i all this time..)
  • press U to undo all latest changes on the current line.
    Note that this only undoes the changes for this line from the last insert mode, it doesn't restore the line as it was when opening the file
  • press P to paste the text before the cursor (this works both when pasting words or entire lines), I only used p so far!
  • THE CHANGE OPERATOR
  • <C-o> and <C-i> to jump around the cursor position history, I never remember this one and press <C-0> instead
  • The substitute command, I always used :%s/old/new/g, as that's what I wanted most of the time, but it's actually :<some-operator>s/old/new/ meaning I can do:
    • :s/old/new/ for editing only the current line
    • :1,3s/old/new/ to only edit lines 1 to 3
    • :100s/old/new/ to only edit line 100
    • :'<,'>s/old/new/ to only edit whatever I have selected
  • REPLACE MODE
• when reading nvim documentation (or man pages via MANPAGER=nvim +Man!) (I keep forgetting these):
  • press K to jump to the hovered word documentation (or man page)
  • press <Enter> on a link to open the linked help section
• the retrieve (:r) command :r FILENAME or :r !<command> to paste the contents wherever the cursor currently is.