The drawing plane is the size of the drawing, specified in real world coordinates, and given in the area’s unit (see Unit and scale).
Default, the drawing plane is
56 meters wide and
40 meters high.
At the default print scale of
1:50, it will print on A0 paper.
However, you can set the drawing plane’s boundary coordinates to any 64-bit floating point value
(which is large enough for a drawing of the universe in mm).
4D CAD has an auto-resize feature. If objects move outside the drawing plane, the bounds of the drawing plane are automatically extended. This is true for user actions as well as for 4D CAD methods being called.