Copy Layer markers to Comp markers

@JohnColombo17100380 Thank you so much! I don't even know how long I've been searching for a solution to this! I'm a VFX Artist. When I'm compositing several shots in one scene, I will usually get shots grouped together that are shot from the same angle. I can string them together in one Comp and composite them all as one shot. the footage is precomped to one layer so it can be degrained and clean plated as one layer. This is so all my background & DMP layers, set extension, matting, keying settings, etc. are consistent through all the shots in that scene from that angle. If something needs changing, I only need to change it once.  I have scripts that set all this up, makes my render comps edited from the main strung together work comp. Each shot in my main work comp is separated by layer markers with the shot name at the first frame of each shot. If my layer stack gets really long I have to search for where those markers are, but if they're in the comp markers section, They'll always be visible. 

Hi @TheFosterHouse,

Thanks very much for this request, I've created a ticket for our team to review. What type of workflow do you think would benefit from this feature?

It is definitely possible to accomplish this via scripting. Below is a short script that will copy layer markers from selected layers to comp markers with comments, labels, etc. It can also remove the layer markers, but I've left that commented out.

(function copyLayerMarkersToComposition() {
  var activeComp = app.project.activeItem instanceof CompItem && app.project.activeItem;

  if (!activeComp || !activeComp.selectedLayers.length) {
    alert("Please select a layer with markers.");
    return null;
  }

  app.beginUndoGroup("Copy layer markers to composition");

  try {
    var currentLayer, markerValue, markerTime, markerCopy;

    for (var l = 0; l < activeComp.selectedLayers.length; ++l) {
      currentLayer = activeComp.selectedLayers[l];

      for (var m = currentLayer.marker.numKeys; m; --m) {
        markerValue = currentLayer.marker.keyValue(m);
        markerTime = currentLayer.marker.keyTime(m);
        markerCopy = getAllMarkerSettings(markerValue);

        activeComp.markerProperty.setValueAtTime(markerTime, markerCopy);

        // Uncomment this line to remove layer markers
        // currentLayer.marker.removeKey(m);
      }
    }
  } catch (err) {
    alert(err.description);
  } finally {
    app.endUndoGroup();
  }

  function getAllMarkerSettings(marker) {
    var params = marker.getParameters(),
      newMarker = new MarkerValue("");

    newMarker.setParameters(params);

    for (var i in marker) {
      newMarker[i] = marker[i];
    }

    return newMarker;
  }
})();

 Cheers,

- John, After Effects Engineering Team