Regenerates the contents of a specified display. Only
    automatically generated displays are regenerated. These include
    DO displays, register displays, source (cmd-list) displays, and
    instruction (cmd-list) displays. The debugger automatically
    regenerates all these kinds of displays before each prompt. If
    you do not specify a display, it regenerates the contents of all
    automatically generated displays. Do not use this qualifier with
    /CLEAR or when creating a new display.