In the 3D-model, it is possible to use the command Set Anchorage Point to create an anchorage point which can serve as a reference point for the inserted overviews. The result will be that the modified detail blocks are inserted congruently relating their anchorage points.

If you place e.g. a horizontal projection, a longitudinal section and a cross-section aligned with each other and you don’t make use of an anchorage point, the views will probably be displaced towards each other when up-dated. Normally, they are inserted in a centered way and the center point of course moves when the size of a single view is modified.

Use the „Anchorage Point“ option for the insertion position in the detail style at detailing to make use of the anchorage point. For overviews, this should always be done beginning with the first detailing when the determination of views is required. If need be, it may also be modified.

Here you see a 3D-model and three detailed views which have been favorably placed towards each other after insertion. Now, the drawing is up-dated after a modification, first with and then without anchorage point.

The anchorage point (A) has been inserted at the highlighted spot into the 3D-model. In the views, the position has also been highlighted to make things clear.

Afterwards, the construction is modified so that the overall dimensions (and thus the sizes of the views) change.

After the update without anchorage point the position is clearly shifted from the highlighted reference line (manual completions would of course remain at the former position). Due to the additional dimensioning chains, the longitudinal view and the gable view shift towards each other in the base plane.

On the other hand, when the update is carried out with anchorage point, the position of the elements towards each other is kept as it was in the original drawing. The base planes remain aligned to each other and manual completions at unchanged parts remain still suitable.