How to expand coc.nvim incoming calls

Question

In Coc.nvim, when I request document.showIncomingCalls, I get the tree with only one successor showing up with a + sign in its left like the following:

- f1
  + f2

How do I expand the + beside f2 to show the caller of f2 as well?

Answer 1

By default <tab> on f2 will open actions menu. You can change it with :h coc-config-tree-key-actions.