Last week, I had a series of 600 images in a time-lapse series of some clouds moving over a mountain, but I only wanted to use 300 of them to turn into a short video clip in Photoshop. My dilemma was that I needed a quick way to select every other image. I adjusted the thumbnail view so that I could see as many thumbnail icons at one time, and made sure that there were an even number showing in the rows. Then I selected the Painter tool, loaded it with the Flag attribute and swiped from top to bottom along every other column. Once I had flagged every other image, I filtered by flag, chose select all, and then put the 300 images into a collection. Voila!

Very clever solution. Thanks for sharing.
Genius idea
Very smart and helpful idea. Thanks for sharing.
Hi Julieanne,
an “automatic” option would be a text search for “filename” containing 1. 3. 5. 7. 9. (for all odd pictures) resp. 2. 4. 6. 8. 0. (for all even pictures) assuming that your files still have their original file names.