When working with datum extents, follow these best practices.
- When adjusting datum ends (extents) in different views, it is typically best to set the datum end to 2D before making a change. Changing the 3D extents will change the position, and visibility of the datum in all views of the model. Changing to 2D extents first will results in the change only affecting the current view of the model.
- When adjusting 2D and 3D extents, a hollow control grip circle indicates you're working with 3D extents and closed control grip indicates that you're working with 2D extents.
- In order to be visible, 3D extents of the datum must intersect the projection plane (associated in plan views, cut plane of a section view, or clip plane of and elevation view) of the current view.
- Arc shaped grid lines in plan views will never display in section or elevation views.
- Plan multi segment grid lines displayed in elevations and sections will display in the position where they intersect the projection plane of the elevation or section.
- Use a 3D view with levels and grids displayed in 3D to help troubleshoot 3D grid extents and visibility.
- Datums displayed in 3D views will always represent 3D extents of the datums.
- Section boxes in 3D views affect the position of the datums. Datums in a 3D view with a section box applied will display at the edge of the section box.
- Use Propagate Extents to apply the same extents settings to multiple parallel views at one time.
- Create different grid types to not display the center section of a grid line. Use grips to define the "gap" in the grid line. Gaps in gridlines are view specific. Propagate Extents will propagate position of the gap to other views.