If you’re not starting a new from scratch or opening an existing file, what would you be doing?
There is no way to use MillMage without defining a workspace/stock size - but you can absolutely just click through the initial wizard to end up at a blank page and deal with the settings later, if required.
Where LightBurn is tied to the bed area of your machine, MillMage is constrained by your raw material size, so it needs to be input at the beginning. You can make a template and open that, in lieu of going through the setup wizard - just go to ‘File > Save As Template’
Then that template will be in the Templates tab in Project Setup
I have a template for the bed of my Altmill, for example:
