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In the scheme view, click in an area outside of symbol fields while holding down the left mouse button and dragging a selection frame around the symbols you want to select.

The corresponding symbols have been selected.

LINEAR Revit V26
Shows how to make a multiple selection in the pipe run scheme.
In the scheme view, click in an area outside of symbol fields while holding down the left mouse button and dragging a selection frame around the symbols you want to select.

The corresponding symbols have been selected.
