I want to crop and resize my images before bringing them in to PE10 on my iMac running lion. What pixel dimensions are best? The preview of my first image in the playback viewer is terrible. I used 1920 wide by 1080 high in my export settings for the image editer (Lightroom).
I Scale and Crop all of my Still Images in Photoshop (PSElements works well too), to exactly the pixel x pixel dimensions of my Project's Frame Size. If one needs to Pan on a Zoomed Out Still Image, then I would calculate the Pan, and Scale/Crop to that size. You do not want to have overly-large Still Images. This ARTICLE goes into much more detail, and will show how to Automate to>Batch with Actions in PS/PSE.