Specify the reference frame for units on screen.
for example, on the list of RETRACTION settings, the RETRACTION amount is mm of filament. The Vertical lift is mm of Z-Axis travel. Coast, I have always assumed is mm of X/Y travel. I assume Extra Restart is also mm of filament. Having up-front clarity on screen for exactly what the setting refers to on all the settings in S3D would likely prevent some confusion on the part of users.
