Click an existing level or dimension with the mouse to supplement an existing definition.

Use Option New to create a new definition.

With the option ? you call the help.

Use the option No to place each level vertically as required.

Use the option Yes to define an alignment point for the levels.

Specify an alignment point which determines the vertical position of the levels; see illustration Vertical levels P1.

The first point means the definition level. Click a point, the height of which is known (see illustration Vertical levels P2).

Use the Option Settings to change the level settings in a dialog box.

Specify a point by clicking with the mouse or entering the co-ordinates to define the vertical position of the levels; see illustration Vertical levels P1.

Enter the height for the selected point. This value forms the basis of computation for the other levels; see illustration Vertical levels 1000.

Specify the next point from which a level is to be created (e.g. P3) or select an option. The input request is repeated until you enter ENTER to terminate the command.