I'm wondering if theres a way to preview files in a folder just like Premiere pro has it's features to view images/video in a folder showing thumbnails. It's odd to me that After effects doesn't have this same capability. Opening one by one in a preview window takes forever. Wondering if theres an add on or script that helps with this.
What, are you saying that when you highlight a clip in the project pane, you don't see a thumbnail at the top of the pane?
AE has no thumbnail mode, but as Dave said, the preview shows at the top of the project window when you select an item.