How to focus or change point on child frame

Question

I am trying to use lsp-ui package to display some documentation for Rust. When I put the cursor on a type for example, a popup child frame is created but the focus is still on the main window. If I use the mouse to click inside the child frame, I can then scroll with the keyboard but I would like to use the keyboard to change focus inside the child frame and NOT the mouse. Is there any way to do this?

Answer 1

Bind a key (or keys) to run the lsp-ui-doc-focus-frame command:

(use-package lsp-ui
  :bind (("C-h ." . lsp-ui-doc-focus-frame)))