The answer above with xmodmap and xev commands seems like it might point in the right direction. Left-click and hold, then key sequnce while holding? Doesn't seem to work. I can hover over it, or I can left-click it. I want to lock an icon to the launcher, there is no way to select it first and then hit some key sequence. I also did not understand what they expected the cursor/mouse to be doing while you hit shift-f10 or whatever. Most seem to ignore part of the problem, which is that mac keyboards do not have alt or the windows key, in addition to the mouse not having two or more buttons.
My solution was to find an old 2-button mouse and plug it in.
