Lightroom & PS: When cropping, show the aspect ratio (both ways, L/H and H/L) to help sizing for mats.

What is RONC?

RONC is my name.

Got it :->  You want the ability to override the crop dimensions, not override "RONC".

Can you explain more about how you to override crop dimensions?   In Develop's Crop Tool, you can enter custom dimensions with any unit you'd like (pixels, in, cm):

What I would find useful is on the line in LR Library module where "Dimensions" and "Cropped" are given, add in the L/H and H/L ratios.