The Rects mode
A rect is a virtual zone where a sequence can be played. You can for instance, play several sequences on the same LED screen at different positions using several rects.
From the Rects window, click on the "Add rect" button to create a new rect, this will highlight the button and activate the rect drawing function. Just click on the grid and hold the button to draw a new rect. It is possible to modify its size and position with the mouse.
Created rects are listed on the left of the window (Rect1, Rect2...) and can be called at any time. Do not forget that a rect is the property of a specified zone (area).