I use the slot in the top-right of my second monitor for the minimaps. I have my Alts in the Bottom Left, and Top Left and Right Corners. I don't find I need to actually look at their screens very often, anyways. When I push Tab (and it opens the map for all toons), I put all 4 of these maps in the Top-Left corner of the second monitor. Pressing Tab, Escape or Clicking puts the minimaps back.