I have been struggling with this since day 1 of my Xcarve experience.
Not having a way to measure and check sizes of holes or dados or anything is a struggle.
I find myself wasting more material than being able to be specific with what I am cutting.
For example: I wanted to check letter heights and was unable to do so without dragging the text to the ruler on the right to make sure I was not creating signs with different sized fonts.
Also my holes for a number of projects had to be done a couple times to get the right fit but having a tool to measure these specifically would have eliminated this need.
I understand we can use other software but that seems process for process sake when we have a functioning software in Easel.