wezterm/docs/config/lua/keyassignment/ActivateWindowRelativeNoWrap.md

ActivateWindowRelative(delta)

since: nightly builds only

Activates a GUI window relative to the current window.

ActivateWindowRelativeNoWrap(1) activates the next window, while ActivateWindowRelativeNoWrap(-1) activates the previous window.

This action will NOT wrap around; if the current window is the first/last, then this action will not change the current window.

Here's an example of setting up (not very useful) hotkeys to cycle between windows:

local wezterm = require 'wezterm'
local act = wezterm.action

return {
  keys = {
    {
      key = 'r',
      mods = 'ALT',
      action = act.ActivateWindowRelativeNoWrap(1),
    },
    {
      key = 'e',
      mods = 'ALT',
      action = act.ActivateWindowRelativeNoWrap(-1),
    },
  },
}

See also ActivateWindowRelative, ActivateWindow.