Question on vim sendtowindow

I have installed this on Linux mint. When I open vim and enter
:term julia
I get a split window with julia REPL on top and vim on the bottom. The active window is the REPL. How do I switch to the vim window? The tmux command ctrl-B O does not work.

Where is the command to switch windows documented?

In my case I do `Ctrl+W+UPARROW

This is more of a vim question than a Julia question, but the usual window navigation commands should work fine (if this is Neovim, you’ll need to do a CTRL-\ CTRL-N first).

You can check out :help window-move-cursor, but here either CTRL-W CTRL-W or CTRL-W :down_arrow: should do the job.