Here's one for you...personally, I've never used this setting, variable, method before but maybe some of you have.
Using Civil3d/AutoCAD draw a line 100 feet long from left to right. Line can be at an angle if desired.
Place another line, using a different color for visual, by snapping to the left end of the 100 foot line then move your cursor to the opposite end of the 100 foot line, endpoint snap active. Now, DON'T snap to that endpoint. Instead get your cursor close enough to invoke the proximity snap but don't accept it, input a distance of 50 feet. Does the newly placed line follow the direction of the 100 foot line or does it follow the placement of your cursor?
I would like it to follow where that snap is showing, not the cursor. Anyone know the variable or setting that controls this? Based on my testing, it is not Polar Tracking.
Below is a GIF showing what I'm trying to do with a (I think) variable already within AutoCAD. Notice, I'm drawing the lines toward the end point snap but I am NOT snapping to those endpoints. I start at the vertex and draw a line at a certain distance toward the endpoint. Any help is appreciated.
https://imgur.com/a/BEaHFps