Not sure…here is an example…
and something here for multiple
if you use datashapes for selection remember hit finish…
ok here are the results!
with the variant you create, Looks like it’s working! thanks you @sovitek
is this possible on a 2020 version of Revit?
Update:
I’ve reached my message limit apparently, But I wanted to let you know how the results are in further testing, It creates a best-fit line between several lines to dim anything which hits the line, anything which doesn’t hit the line will result to no dims being create
I’ve also noticed that it creates the dimensions only on a south elevation but I will provide further results to this once I am allowed to respond again 
But thank you for the help so far, talk later
awesome ;)…try it not sure with 2020
Hi I’ve Made some additional adjustments to the script, I thought either of you could try and see if you can help figure out some bugs and how to resolve them,
Unfortunately, it seems to only work in the north and south elevations but behaves funny in the West and East Elevations, any chance either of you may be able to help out