How can i set the ZPL label size and DPI

[wongyat88]

How can i set the ZPL label size and DPI, I dont see there is an option for me to edit the label size and DPI.
I know client can manually calculate and draw a box represent as the label size.
But will this feature will be update?

Thanks

[jogibear9988]

Will look how I could add this.

But this is thought more as a Demo of how you could integrate this to your own software.