My new touchscreen laptop does not have the menu button (i.e. the one behaves like a right mouse click) - the one usually next to the right ctrl.

since you cannot left click by touch, I am trying to create a custom keyboard Shortcut for Alt GR for this function (under System > Keyboard > Shortcuts > Custom Shortcuts)

When using the xev command with an onboard keyboard (that has the menu button), I have found out that the button info is:

KeyRelease event, serial 42, synthetic NO, window 0x4800001,

    root 0xab, subw 0x0, time 2544690, (1236,607), root:(1302,1050),

    state 0x0, keycode 135 (keysym 0xff67, Menu), same_screen YES,

    XLookupString gives 0 bytes: 

    XFilterEvent returns: False

However, I have no idea what to do with this info...

btw I am using a Ubuntu 13.04.

Any help would be most appreciated...