PCAC> SELECT/SOURCE/SCROLL SRC2

      The SELECT/SOURCE/SCROLL command selects display SRC2 as the
      current source and scrolling display.

  PCAC> SELECT/INPUT/ERROR OUT

      The SELECT/INPUT/ERROR command selects display OUT as the
      current input and error display. This causes PCA input,
      output (assuming OUT is the current output display), and PCA
      diagnostic messages to be logged in the OUT display in the
      correct sequence.

  PCAA> SELECT/SCROLL OUT
  PCAA> SCROLL/UP

      The first command selects the OUT display as the current
      scrolling display. The SCROLL command has no display-name
      parameter, and therefore scrolls the OUT display.

  PCAA> SELECT/PLOT

      This command cancels the plot display. All PLOT command output
      is directed to the output display.