Specifications

SECTION III
3.3.3.2 Locking Lines
Locking a line simultaneously excludes from scrolling
the row on the screen on which the cursor appears
the associated line in memory on which the cursor is located.
Any collection of rows may be locked; up to a total of 23. The associated line(s) in memory,
i.e., the line on the row when the row is locked, is excluded from scrolling. In other words,
the lines in locked rows remain on the screen when the page is on screen. All other lines
of the page scroll. Together, the effect is like a window with louvers. (See Figures 3-7.)
To lock a line,
1. Move the cursor to the row to be locked
2. Enter the sequence ESC ! 1
3. Repeat steps 1 and 2 for each row to be locked.
To unlock all locked lines, enter the sequence
ESC ! 2
NOTE
When lines are locked, cursor location is determined by the scroll area.
E.g., the first line of the scroll area is identified as line 1, the second line
(if any) as line 2, and so on. The number of the last line of the scroll area
is
Page size - number of tocked lines
NOTE also
When all lines are again unlocked, data on previously locked rows
resume scroll-order relative to the lines on screen. See the example
below.
3-16