diff --git a/docs/01-prerequisites.md b/docs/01-prerequisites.md
index 0dd48dc..838969d 100644
--- a/docs/01-prerequisites.md
+++ b/docs/01-prerequisites.md
@@ -82,6 +82,8 @@ libvirt-daemon-driver-storage-rbd-4.10.0-2.2.x86_64
 
 If you want to setup tmux like above, `ctrl+b` -> `"` twice, then `ctrl+b` -> `alt+2`.
 
+You can move to another window by `ctrl+b`, then an arrow key where you want to move.
+
 > Enable `synchronize-panes`: `ctrl+b` then `shift :`. Then type `set synchronize-panes on` at the prompt. To disable synchronization: `set synchronize-panes off`.
 >