A computer providing multiple display capability where one display presents the current document and another display may show a true display of a previously opened document. The computer is a singular processed video
data signal source which presents a primary monitor with current video data. A user selected
video screen sample of the current processed video
data signal is diverted to this invention where it is stored in a memory. Subsequently the stored
video screen sample of the processed video
data signal is read-out of the memory and reconstituted as an absolute copy of the original processed video data
signal and concurrently presented on a secondary monitor. User selection may be attained by a keyboard key-sequence entry, a
mouse button click or using an external button-switch. Operation is absolutely independent from
operating system constraints, being of equivalent usefulness while running any
Operating System versions of Windows(R),
Unix, MS-DOS, Linux, CP / M86 or Apple-OS. The device is preferably configured as a standalone
peripheral, having two video ports connected essentially between the computer's "
video output" port and the primary monitor's "video input" port and a third video port coupled with the secondary monitor's "video input" port.