A cumulative selection is a selection in the geometry sequence that is a union of contributions from other selections. Cumulative selections are especially useful to construct a selection that has different definitions in different branches of an If clause. You can also use them as an alternative to a Union Selection node. Cumulative Selection nodes () for each cumulative selection appear under Cumulative Selections () at the bottom of the geometry sequence under Geometry. For example, a Circle node creates four associated cumulative selections, which all have the same label (for example, Cumulative Selection 1). They appear with different labels under Cumulative Selections: Cumulative Selection 1 (Object), Cumulative Selection 1 (Domain), Cumulative Selection 1 (Boundary), and Cumulative Selection 1 (Point). On the other hand, when you use the Contribute to list in a selection node, for example, only one Cumulative Selection node is created for the geometric entity level for that selection. When you select a Cumulative Selection node, the corresponding geometry objects or geometric entities appear in yellow in the Graphics window.

In the Settings window for Cumulative Selection nodes, you can rename a cumulative selection using the Label field. All Cumulative Selection nodes except those for the Object level also include the following section:

Select the Show in physics check box (the Show in instances check box in geometry parts; Show in 3D in a plane geometry under a work plane in a 3D component) to make the cumulative selection available in physics, materials, and other applicable settings outside of the geometry sequence. This check box is selected by default.

For a selection geometry feature, you can let it contribute to an existing cumulative selection by choosing an existing cumulative selection in the Contribute to list in its Resulting Selection section. To let it contribute to a new cumulative selection, click the New button.

For a geometry feature that has a Selections of Resulting Entities section in its Settings window, you can similarly let the resulting entities contribute to a cumulative selection by choosing an existing cumulative selection in the Contribute to list or clicking the New button.

You can also create a new cumulative selection by right-clicking the Cumulative Selections node and select Cumulative Selection. New Cumulative Selection nodes then appear.

To remove a contribution to a cumulative selection, select None in the Contribute to list.

To remove a cumulative selection, right-click any Cumulative Selection node that belongs to that cumulative selection and select Delete (). You can also right-click the main Cumulative Selections node and select Delete Unused Selections () to delete all cumulative selections that are not used.