如何显示打开的褶皱？

Question

How can I show open folds in vim? (ie, folds that are currently open)

eg, show the open folds within the text somehow, like marking the lines;
or perhaps show them as a list (eg, like the :jumps command that shows a list of jumps)

Answer 1

I don't know that folds can be listed, but marking of lines is possible using the foldcolumn option. ( :help 'foldcolumn' ). Try

set foldcolumn=12

Caveat: per the documentation, if nofoldenable is set, open folds will not be shown in the foldcolumn .
[foldenable] can be toggled with the *zi* command. The 'foldcolumn' will remain blank when 'foldenable' is off. [ :help foldenable ]