Vim: Fold top level folds only

Question

I have a long code file with syntax folding in Vim.

I know how to open all folds (zR) or close all folds (zM), and I know how to increase or decrease the foldlevel (zm,

Answer 1

As Karl says, the foldnestmax setting is probably what you want.

zO (i.e., capital-letter-o) opens all nested folds.

I also find zx and zv very helpful.

When I use foldmethod=expr with a custom fold expression, I'll often modify the expression so that it only folds what I want it to fold.