Cannot enable "snap" for imported PDF in R2020

[HVAC-Novice]

I have PDF imported to use a tracing background. The check box for the "enable snap" feature is grayed out. 

how do i enable snapping? 

[ToanDN · Accepted solution]

Because it is a raster, not a vector PDF?

[HVAC-Novice]

You are correct, this PDF is scanned from a paper plan. 

I tried with a PDF that I had generated with Revit (Vector Processing) and it "un-grays" that check mark and I can trace by "picking lines".

Assuming most older plans are scanned, this won't really help me. The scanned copies are not perfect anyway (rotated by 0.347° etc.). So I guess I will have to just manually trace. 

Thanks for your help. 

[DDD-Greg]

Hi,

I am also having the same issue not being able to enable snaps for a pdf file in Revit 2020. I am following a training video where the trainer imports a raster door image from a website and he is able to enable snaps and then scale. Not sure why I can't as I have used the same file from the same website. Still snaps are grey'ed out? Any Ideas? thanks Greg D.

[nabo_raymond]

Hello
I've watched some videos on youtube where they have able to snap a "RASTER IMAGE"