rapid-digitize-switch ("rap")
See this command in the command table.
To access this command:
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Edit ribbon >> Edit >> New String >> Rapid Digitize Mode.
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Edit ribbon >> Tools >> More >> Rapid Digitize Mode.
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Using the command line, enter "rapid-digitize-switch"
 - Use the quick key combination "rap".
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On the Find Command screen, highlight rapid-digitize-switch and click Run.
 
Command Overview
Toggles the capability to incorporate segments of an existing string(s) when digitizing a new string using new-string or extending an existing string using extend-string. All the segments of an existing string, between the two snapped reference points, will be duplicated and used as part of the new string.
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If the reference string snapped to is closed, the command will always choose the shortest distance between the snap points.
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The snap settings will determine the snapping behavior.
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The new string may be extended along the length of the existing string by repeatedly snapping using the right mouse button. If an error is made, the undo-last-string-edit command will remove the erroneous section.
 
Command Example
Using the following string as a reference...
                                                
                                            
...the following new string (highlighted yellow) can be created by digitizing the five points shown in sequence, snapping to points 3 and 4:
                                                
                                                
                                            
Command steps:
This command is typically accessed whilst digitizing new string(s), with other strings displayed on screen:
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Running the rapid-digitize-switch command.
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Snap (right-click) to the first reference point on the existing string.
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Snap to the second reference point on the same string.
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Rerun the command to turn the switch OFF.
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Digitize the remaining new string points, repeating steps 1 to 4 if required.
 
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