I fully customize retail pos screen and change the color and text of components of the main form as below pictures. my problem is that I want to place a lablel at top of the pos. In normal sale scenario that lable must show a text like "normal sale". But when chashier try to return items of a previous sale that label must change to shows something like "Return mode".
In fact I want to inform the cashier about current mode(Sale or return). I explain the subject on below pictures too.
Please help me how can I do that or any idea to inform cashier about current mode. I know taht the screen of the main form comes from backend and couldn't change it from any of Services or Triggers DLLs.