I think, the easiest way to reveal the launcher on a tablet would be a gesture like at the dolphin browser for Android to open the bookmarks.
Just wipe right from the left border. The launcher should stay open. Wipe left to hide. Wipe up and down to scroll and tap to open the Dash or run an application. Markus -- Mailing list: https://launchpad.net/~ubuntu-tablet Post to : ubuntu-tablet@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-tablet More help : https://help.launchpad.net/ListHelp