Don't tip period. I don't need someone to take my order or bring me my plate. If I could I'd talk to tha chef my self n pick up my plate from tha window when ready no issues.
I'd tip tha CHEF but even then...I already paid for the meal so that seems redundant.
Well then just go to Panda Express where you look thru the window and point at the food you want plopped onto your plastic container.