Allows you to organize or separate unconnected pieces into groups. A tray is a kind of a side table where you can lay aside any number of pieces in accordance with your needs. You can have as many trays as you want: simply click Tray on the room main menu, choose a name for a new tray and drag pieces into it by the mouse. You can also minimize a tray and get more space for other pieces. You can bring pieces into a minimized tray: just put the piece(s) down the tray. All tools work in a tray (Catch rest, Arrange, Disarrange, poking). Just display the context menu by clicking the empty part of a tray.
Tip: Sorting is faster if you select more pieces and bring them all together into a tray.