User`s guide

38 Setup
Columns: [80, 132, 80-Only]
Choose the number of columns that the screen can display.
80-Only provides more pages in memory for a given page length by
disallowing changes to 132-column display.
Width Change Clear: [On, Off]
Select whether the screen is to be cleared when the number of
columns on the screen is changed from 80 to 132 or vice versa.
Changing columns from/to 80-only forces the screen to clear
independent of Width Change Clear.
Speed: [Fast, Normal]
Selecting “fast” improves the speed at which screen display
occurs at the expense of minor, temporary distortion of text
called “tearing.”
Scroll: [Jump, Smooth]
Choose whether the data on the screen scrolls smoothly or
“jumps” to accommodate data at the rate it is received.
Scroll Speed: [Smooth 1, Smooth 2, Smooth 4, Smooth 8]
Select the number of scan lines per second the page scrolls up
when smooth scroll is selected. Smooth 1 is the slowest rate and
Smooth 8 is the fastest.
Refresh Rate: [60 Hz, 71 Hz, 82 Hz, 100 Hz]
Select the rate (number of times per second) at which the image
on your terminal’s display is updated. This selection is only
available in 26 or 30 line display mode.
Overscan Borders: [On, Off]
Choose whether the overscan borders are active. The borders
extend video from one edge of the screen to the next. (To see
the borders, select reverse for Screen Video.)