Just a few hand movements are necessary for aligning the Crossline line laser, and for projecting a broad laser cross pattern onto walls and ceilings. The laser beam angle of 125 degrees creates a broad, highly visible panoramic line, which significantly simplifies alignment and installation tasks. The rotary knob on the side of the device controls the on/off function and the transport lock. The control panel for different user modes is located on top of the housing so as to enhance user-friendliness.