Board Game Arena

This the first time that I have tried this game. I was playing Solo and on the Poland Invasion. How do I trace line of Supply with the BGA version?

Welcome to the game, and thanks for trying it out! Nice avatar choice too.

Supply will be traced automatically by the game during the supply phase. If you can get to an Unlimited Supply Source, then during the supply phase, you'll see USS as a blue box in the mini-window for that unit. Note that if you are tracing supply overseas and the enemy could intercept the supply trace, then you won't see that. Instead, you'll need to trace the supply path manually by clicking on the unit, and then clicking on the roads / cities / ports / convoy / sea zones for the path.