If multiple groups are used, an additional entry for positioning is shown in the system tree.
The page “Positioning” can be used to define constraints for group positions. New constraints are added using the 
-button, they can be sorted using the arrows. The constraints are evaluated once per calculation, so the order can be important.
Different constraints are available:
•Group parallel to group: Specify an offset between two groups.
•Group according to gear pair: The selected group is positioned according to the selected gear pair. An additional angle has to be specified, zero is for a center distance on the y-axis. An axial offset can be entered if the centers of the gears should not align axially.
•Group according to two gear pairs: One group is positioned according to the center distances of two gear pairs. The axial position is defined by the first gear pair.
•Group according bevel gear pair: One group is positioned according to geometry data of a bevel gear. The angle of contact for the reference group can be defined.
•Shaft according to gear pair: This constraint is moving a shaft axially, so that the centers of the gears are aligned. An axial offset can be entered optionally.
•Gear according to gear pair: This constraint is moving a gear axially so that it is aligned with its mating gear. Here an axial offset can be entered optionally, too.
•Group according worm gear pair: The selected group is positioned according to the selected worm gear pair. An additional angle has to be specified, zero is for a center distance on the y-axis. An offset can be entered axially to the worm.
