cross portals in WOW

How to cross portals in WOW with my multibox all at once

is to show the mouse cursor on all screens

[bob]

Are you asking how to turn on broadcasting ? the Right hand toggle button or SHIFT+ALT+R usually.

Unless you have opted for the Per Window switching config style (the default for WoW). Where broadcasting does not exist, because that is not allowed under Blizzard's rules.

thank you very much for such a prompt response