Pentax R-200 Series Instruction Manual page 122

Press [F5][ENT] to save an intersection point.
The PN, X, Y, Z and PC are viewed and can be edited.
If all items are OK, press [F5][ACCEPT] to save them.
8.1.7 DISTANCE OFFSET
Offset distance of new point to the line and distance of start point to new point are displayed. Also
new Point on the line is calculated by point of start, end, and offset. You can store the new point.
Input: line : start point ( SP ) and end point ( EP )
offset point ( OP )
Output: new point
offset of new point from the line
( moving in the direction from start point to end point, right is positive, left is negative )
distance of new point from start point
From the PowerTopoLite screen, press [F2][CALC] to view
the CALCULATION screen.
Select 1.COGO and press [ENT] to view the COGO screen.
Select the 7. DISTANCE OFFSET and press [ENT] to view
DISTANCE OFFSET screen.
Offset P
(― )
New Point
SP
DISTANCE
57
OFFSET
EP
(＋)
Offset P