I often find it easier to map <kbd>Cmd</kbd>+"number" to one of the panes. You can do this by pressing <kbd>Cmd</kbd>+<kbd>,</kbd> to navigate the iTerm Preferences, then go to **Keys** > **Navigation shortcuts**. In "Shortcut to choose a split pane", choose <kbd>Cmd</kbd>+"number". Then if you have three panes, you can navigate to each of them with <kbd>Cmd</kbd>+<kbd>1</kbd>, <kbd>Cmd</kbd>+<kbd>2</kbd>, and <kbd>Cmd</kbd>+<kbd>3</kbd> respectively.