Work "sitting" or "standing". Height can be adjusted for taller users (up to 6 1/4" above desktop) and the range of motion below desk is 5" for custom knee clearance. A simple one-handed motion instantly repositions keyboards height without locks or levers. The 10" round mousing platform mounts over your keypad or flush with keyboard. Leatherette keyboard palm support with Microban™ antimicrobial product protection keeps product cleaner. Workstation Type: Curved; Diagonal; Straight; Sit-to-Stand Option: Yes; Height (+/- Desktop): +6.25" Above to -5" Below; Keyboard Tray Dimensions (W x D): 19" x 10.63".