Margins; Editing Functions - Data General Dasher D461 User Manual

and resume vertical scrolling at any time from the keyboard. Smooth
scrolling coupled with screen freeze makes it easy for you to scan or
read through information on the screen.
Margins
The active window combines with the programmable margins feature to
define the working area on the display screen. Window boundaries are
the upper and lower boundary lines running across the display screen at
the top and bottom of each window; margins are the left and right
boundary lines. Movement of the display-screen cursor is restricted to
the area between the margins in the active window. Attempting to
position the cursor beyond the edge of a window results in the cursor
pegging at the margin. The margin settings extend across window
boundaries; this means only one set of margins is in effect at any time.
An alternate margin feature makes it possible to assign a second set of
margins while saving the normal margins for future use.
When the 0411/0461 terminal is turned on, the left and right margins
are set to columns 0 and 79, respectively. You can resest the margins
easily under host computer control to any of the columns in the range
of 0 to 207. The only restriction on margin assignment is that the left
margin column number be no greater than the right margin column
number. When the left and right margins are the same, the working
area in the active window is one column wide.
Editing Functions
The D411/0461 terminal includes special built-in editing features that
provide for easy and fast reorganization of characters on the display
screen. Highlights of the editing features include:
• Insert/delete individual characters or complete lines. This feature
cuts down on host/terminal character traffic by making these
editing operations possible without rewriting part or all of the
display screen.
• Besides the conventional screen- and line-erase capabilities, the
0411/0461 terminal is equipped with window-erase and
unprotected-text-erase commands. These commands complement
the window and protected text features of the terminal.
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