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16     Introduction 
The figure below represents the entire page memory of a 48 line 
page (24 base page length times a multiplier of 2) and the portion 
of the page that is viewable on the display screen, when “26 
Lines” is selected.  Notice that the label line is visible in this 
mode. 
 
 
Visual Effects of Screen and Page Lengths 
The combination of page and screen lengths influence the 
number of displayable data lines.  For example, if the page length 
is “50” (25 x 2), and the screen length is 44 lines, the number of 
data lines that are visible at any one time is 43, with no label line 
(the other line is used for the top status line).  On a 52 line 
screen, 50 of the 52 data lines are visible at one time. 
If the page length is shorter than the screen length, blank lines 
are  present below the data line or status/label line.  If the page 
length is larger than the allowable number of data lines, some of 
the rows are out of view.  In order to bring them into view, 
“scrolling” or “panning” is used as necessary.  
Scrolling causes a new line to scroll into view when the cursor 
advances past the last or first row on the page.  If the cursor 
moves past the last row, the top row of text is lost; if past the first