If multiple elements (such as walls and/or lines) are joined in a continuous chain, you can select the entire chain. The chain can include different types of elements.
To select a chain of walls or lines
Revit highlights all elements in the chain.
Valid chains for selection:
Four walls joined
Four area separation lines joined
Walls and area separation lines joined
If multiple walls are joined at the same point, the chain continues along the wall that makes the smallest angle with the one currently highlighted. Walls joined at mid-end faces can also be included in a chain selection. See Joining Walls to Mid-End Faces.
As shown in the following illustration of a selected chain of walls, drag controls display at the coincident endpoints. You can drag these controls to new locations without unjoining the endpoints. See Modifying a Selected Chain.
A selected chain of walls with drag controls