I saved a screenplay in PDF format using anothe rprogram. Imagine my dismay when I tried to import it into Scrivener but could not! I tried converting it into a RTF format file and it came out awful! Please incorporate that feature into Scrivener!
I'd suggest exporting from the other program to a different format. PDF is a non-editable format by design, and as a result any method for extracting the text is almost guaranteed to lose important formatting.