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

DisableDefaultAssignment

Has no special meaning of its own; this action will undo the registration of a default assignment if that key/mouse/modifier combination is one of the default assignments and cause the key press to be propagated through to the tab for processing.

local wezterm = require 'wezterm'

return {
  keys = {
    -- Turn off the default CMD-m Hide action, allowing CMD-m to
    -- be potentially recognized and handled by the tab
    {
      key = 'm',
      mods = 'CMD',
      action = wezterm.action.DisableDefaultAssignment,
    },
  },
}