PD12 does not do what you want, yet.
What I do sometimes, I select a group of photos to drag track2, lock track1, apply the transition will be applied only on track 2, drag back the photos to track1, repeat if fallen for most groups of photos.
This message was edited 1 time. Last update was at Aug 25. 2014 15:16
AMD-FX 8350 / 8GB DDR3
SSD SUV400S37240G / 2-HD WD 1TB
AMD Radeon R9 270 / AOC M2470SWD
Windows 7-64 / PD16 Ultimate