The zoom info bar displays the size of a screen pixel, measured in the area’s unit (see Unit and scale).
4D CAD implements stepped zooming,
which makes sure that a pixel on the screen corresponds
to an integral number of units. Thus, drawing objects is more precise
(this feature can be customized with
In rare cases, the zoom info bar will display an error code instead. This happens when a screen refresh causes an error. If so, click on the zoom info bar to reset it.