📏 How Insert Line–Line works
In this case, you first locate the two parallel lines you wish to dimension between.
The dimension will represent the 3D distance from the first line to the second line.
The position of the dimension is determined by the point where you selected the first line.
You would use this dimensioning command to detail the rafter length on a roof plane.
Note: if the lines you select are not parallel, the dimension is not inserted.
🧭 Boundary lines on 2D roof planes
If the lines you want to dimension between are boundary lines of 2D-roof planes (created by 2D Design), then you will get the 3D distance reported.
🔺 Using Line–Line on a hip end (eave + ridge)
If this function is used on the eave and ridge line of a hip end, the apex will be used to determine the dimension.
Select the eave line first (d1) as this sets the position for the dimension. Then select the ridge line.
The reminder message is displayed, giving you the option to accept the dimension, in case you selected lines in error.


