left-hand side menu, i.e. "Variable Size", "Open", "Print All", etc. --> No problem.
top menu bar, i.e. "File", "State", "Page", "Portrait", etc. --> Can't access it.
for instance, to toggle Portrait and Landscape, well clicking has no effect, the best I can do is to see the options displayed, but I can't scroll up and down. This is clicking or tapping with the touchpad.
Using CTRL+7 or CTRL+8 did toggle portrait/landscape mode.