Add Edit Markers is a new Script for After Effects from Lloyd Alvarez, that has a single purpose, to add markers to anything in the After Effects timeline. Add Edit Markers will automatically add markers for just the in, out, or both in and out points of all the selected layers or all layers in the After Effects timeline.

Will add Layer or Comp marker at the in and out points of the selected layers in a comp

This seems pretty straight forward, and it is for the most part, however, adding layer or comp markers to any number of clips in After Effects will take some of your time. With the Add Edit Markers script, you can add markers to any number of layers or all the layers instantly. Great stuff! Check out the Add Edit Markers Script for After Effects here.