Actually, I think for those button options, the number you set tells the option what button it emulates, with 1 = left mouse button, 2 = middle mouse button, 3 = right mouse button. So to make the Right Bottom Corner act as the right mouse button, you should set RBCornerButton = 3
The same is true for the TapButtonX options. TapButton1 is the single-finger tap, TapButton2 is a two-finger tap, etc. So if I wanted to make a two-finger tap be a right click I would set TapButton2 = 3.
You can find details of all the synaptics options in the man page
Code:man synaptics
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