Confused with PASS and Professional Evaluation Form

In preparation for the upcoming PASS application cycle, I have been contacting my evaluators for LORs with general guidelines. When they submit to PASS, can they upload a PDF version of LOR? Or do they have to copy and paste what they have written to a window in PASS? The reason I am asking this is because I don't know if I should ask them to sign by hand at the end and scan. Please let me know if anyone knows.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Dental Residents and Practicing Dentists Source Type: forums