Why do you not have rulers on Lightroom?

My “two pennies worth” on this question-  The Lightroom apps are parametric editors (as opposed to Pixel based editors like Photoshop.).

A parametric photo editor is a non-destructive image editing application that saves edits as a set of instructions (parameters) rather than altering the original pixel data.

Until you export a derivative image (TIF, JPG), or open in a pixel editor after a crop in Lightroom, your image does not have ‘cropped’ pixel dimensions that can be related to a physical size by resolution (PPI). Only then, in a pixel editor, does a ruler make sense.

I think I requested this too in another post! Literally the most obvious feature that should have been added since day one!

I don’t understand why developers haven’t added this, since the coding format already exists from other adobe apps (photoshop, premiere pro, etc)

I’m on Lightroom Cloud (Desktop) by the way.

​@CMass 

Hey ​@roselletorres, 
 

Would this be for the Desktop, iPad, or Mobile version? Can you share more about in which tool you  you would like to see this ruler? 

^CMass