The Redraw command lets you redraw the screen.

In order to redraw the screen as quickly as possible, the entire screen is not redrawn when the screen contents are changed. It may thus be the case, for example, that parts of deleted elements which are newly displayed on the screen during a drawing operation are outside the zone. Parts of the deleted element may thus remain visible on the screen even though they are no longer present in the drawing.

When the menu command Redraw is selected the screen is redrawn and the drawing displayed in its current status.