https://stackoverflow.com/questions/5288875/how-to-expand-collapse-a-diff-sections-in-vimdiff
Keyboard Shortcuts:
d o Get changes from other window into the current window.
d p Put the changes from current window into the other window.
] c Jump to the next change.
[ c Jump to the previous change.
CTRL+W, w - Switch to the other split window
(CTRL+W, CTRL+W does the same thing, in case you let go of the CTRL key a bit later)
:diffupdate :diffu -> recalculate the diff, useful when after making several changes vim's isn't showing minimal changes anymore. Note that it only works if the files have been modified inside vimdiff. Otherwise, use:
:e to reload the files if they have been modified outside of vimdiff.
:set noscrollbind -> temporarily disable simultaneous scrolling on both buffers, reenable by
:set scrollbind and scrolling.
Most of what you asked for is folding: vim user manual's chapter on folding. Outside of diffs I sometime use:
zo -> open fold. 或是按方向右鍵
zc -> close fold.
But you'll probably be better served by:
zr -> reducing folding level.
zm -> one more folding level, please.
or even:
zR -> Reduce completely the folding, I said!.
zM -> fold Most!.
