I cannot see my previous reply so I ma posting this again.
A quick question, are you developing the software for your needs or your customers needs.
Some of your paying customers have asked you for a feature that many feel they would find useful including myself.
It may not suit the way you work but don't your customers needs and satisfaction count for anything?
Displaying the coordinates on screen would take up little room and I am sure that internally the software knows or could very easily be aware of the coordinates of the mouse position.
They have given you an examples of why they feel it would benefit them and your response is that they use dimensions for example.
Your response is that they need to think differently, maybe you could think differently in this case and be a bit more flexible. Creating dimensions can't be as quick and as useful as a quick glance of the on screen coordinates in all cases.
I feel that paying customers and their receiving their money should be seen as a privilege and not a right and doing what you can to provide greater satisfaction should count for something.
Do you feel it would detract from the software or user experience of you displayed the coordinates of the mouse on screen?