How to set round robin with right click?

Anyone use this feature with right click? I can't seem to figure it out.

[lax]

Use the Mapped Key Wizard and pick the Round Robin option when it asks what kind to make is really about it.

Note that for Diablo 3 you may also want Shift+Right Click to also do the same round-robin. After setting up the Mouse2 (right click) one, create an alternate Hotkey for the Mouse2 mapping you just made. You can use the Alternate Hotkey option in the Mapped Key Wizard to do so.

TL;DR: select Mapped Key Wizard from the Wizards menu.