This box sets the number of lines on the display, not including the status
line. This defines the display size, and the host can position and write characters
anywhere within this area. The maximum number of rows you can enter depends
on the display resolution; the higher the screen resolution your video adapter
provides, the more rows you can fit on the screen.
When you change the number of rows, characters are scaled vertically to fit the desired number of rows, or lines, in the Terminal window. The display is erased (all of display memory is cleared) before the new setting takes effect.
Note: This setting is saved as part of the model's default settings,
and will be used when initially connecting or resetting a session. Another setting,
VT Page Size, reflects the current terminal
state, which can be changed by the host.