The ornamental design for a compactkeyboardtrayassembly, as shown and described.
FIG. 1 is a left, front perspective view of a compact keyboard tray
assembly illustrating my new design with the keyboard tray assembly in a
stored position, the broken line drawing of a housing is for illustrative
purposes only and forms no part of the claimed design, the right, rear
perspective view is identical;
FIG. 2 is a left, front perspective view thereof, the keyboard tray
assembly in a pulled out position, the broken line drawing of a housing is
for illustrative purposes only and forms no part of the claimed design,
the right, front perspective view is a mirror image; and,
FIG. 3 is a left, front perspective view thereof, the keyboard tray
assembly in another pulled out position, the broken line drawing of a
housing is for illustrative purposes only and forms no part of the claimed
design, the right, front perspective view is a mirror image.