1. Resize splits: :[vertical ]resize [+-]N
   • resize: sets (or increments/decrements) the height of the window to (by) N rows
   • vertical resize: sets (or increments/decrements) the width of the window to (by) N columns
   • Note how the cmd names are confusing (vertical resize moves split left/right)
2. Rearrange splits: <ctrl-w> HJKL
   • Moves the split that I am currently in towards the specified direction
   • NOTE: The directions are capitalized (i.e. <shift-hjkl>)
   • TIP: Close NERDTree split before moving splits around, turn it back on later (since NERDTree will be moved around too)

Reference:

• https://superuser.com/a/223951
• https://vim.fandom.com/wiki/Resize_splits_more_quickly