Selecting elements in Revit
Hover the pointer over an element, once highlighted, click the mouse. To deselect, press ESC or click the background.
While hovering the cursor over elements, press the TAB key to cycle through connected and overlapping elements. Once the necessary elements are highlighted, click to select.
To create a window selection, click and hold the left mouse button, drag the cursor diagonally, and release the button.
To select same elements after performing an action, press CTRL and the left arrow key or right click and select Select Previous.