I'm setting up a print that will just use one filament, but has a thin base so I want to print a raft. So for fun and variety, I'm using the other filament to print the raft.
So - left extruder is plain ol' white PLA, right extruder is 3dPrintLife transparent PLA. Raft will be printed with the left extruder. All seems fine, except that when it's printing the raft, the left extruder is "up" and the right extruder is "down," so the first layer of the raft doesn't settle right on the platform (which can either make it easier to remove, or cause unfortunate bulges and other defects) but more importantly, the right extruder will rake through it while the print heads are traveling, and rip it off the platform (causing the same sorts of issues and/or bonuses).
Is there a setting I'm missing somewhere that tells the printer how to manage extruder height while printing the raft? For my first several prints (I got the printer less than a month ago), when I happened to print rafts they were printed from the right extruder so I don't know if I lucked on a setting at that point and then forgot it, or if the right extruder is always "down" while printing rafts. I would just swap the filaments, but I'm battling another issue of filament jams (https://forum.raise3d.com/viewtopic.php?f=4&t=9575) and it seems that the non-Raise3D filament is less likely to become hosed in the right extruder.

Any thoughts, or links to manuals that I can RTF, would be appreciated!