When using dual monitors, is it possible to get the screenshots to appear on the desktop of the screen it captured?
Files sent to Desktop will always land on the right side of the primary display - under your disk drives if you have them showing. 

You can change which screen is primary, &amp; though I can't test as I don't have a laptop, the primary is very likely to reset to internal every time the external is unplugged.

Change primary by dragging the white menu bar segment as shown below