I often customize my wall mounted tablet dashboard from my PC but because the screens are different sizes, I have to adjust my web browser size until the same number of rows and columns of tiles are displayed as the wall mounted tablet.
It would be helpful if I could lock a certain dashboard to a certain number of rows, and maybe columns so that no matter what device I was using to edit that dashboard, the layout would be fixed.
Thanks for the suggestion, CJ!
I’ll leave the topic open to community feedback. We use community feedback as a key component of how we prioritize what we work on, so the more people that show interest in a topic, the more likely it is to get prioritized. 
In the meantime, one approach used by the community is to use the device toolbar in Google Chrome to simulate your desired tablet:
Check out the thread for more details including how to add custom devices if they don’t already exist in Chrome’s device toolbar.
Oh yes, I think I was told about this trick before but it’s a weird approach and slips my mind! I’ll try and remember to do this each time!