Editing HD 60P .MOV files.It was very heavy (slow) editing on the timeline.

Activated shadow files, improved more still very heavy.

Then I copy the shadow files, and edited from them, got better, like when I edit files MPEG2 (SD 720x480) which is standard I think.

PD renames shadow files, in my case had many files, used this sofware ReNamer to leave the name the same as the original files, PD worked well.

Renamed the folder MEPG2 files.

Reopened project, to redirect PD folder with the original file to produce output in HD or DVD using a personal profile, works well for me.

(Signature PC)

(For shadow copy files must activate show files / folders hidden and system, Windows)

It would be good PD works with shadow files without all this maneuver. AMD-FX 8350 / 8GB DDR3
SSD SUV400S37240G / 2-HD WD 1TB
AMD Radeon R9 270 / AOC M2470SWD
Windows 7-64 / PD16 Ultimate