I have a B/W TIFF, 20.87x29.65cm (A4, Portrait). My printer settings are A4-portrait.
My units are "cm", NO option "Maintain aspect ratio"
Command "Print" - Layout - "Single-Custom" 
I activate "Automatic rotate" and enter "Width 21, Height 29.7"  -> the preview is rotated 90° ???. 
I disable automatic rotate -> the preview is OK..
I change Width/height -> OK witout Rotating. Not OK with Rotating
Seem to be a problem in connection "Rotate / Mainatin aspect ratio".?
Command "Print" - Layout - "Single-Scale" 
I use X = 1.2, Y = 0.3, rotate automatic -> but there is no rotation (where I think it should be ...)
Command "Print" - Layout - "Single-Scale" 
If I set "X=100" and "Y=100", it scales "only" to "max. fit on page" (Scale 1.1), but in the edit box is displayed "100 / 100". It should display the real scale-value.
Peter
			
			
									
						
							Print / "Single Custom"
Print / "Single Custom"
XnViewMP <Current version>  German, XnConvert <Current version>, Win 10