"Blend If" indication in Layers Panel

Question

My periodic 18 month request to have an icon Layers Palette to indicate if "Blend If" Blending Option is active. It is playing detective to track a Blend If down. It would be nice to have an indication not only if Blend If Grey, but Blend If R,G and/or B as well. Very frustrating if you use Blend If a lot, like I do.

Answer 1

When 'Blend If' is used there is an entry in layerEffects this is 'scale', unfortunatly scale is used in other effects so a script can't tell if Blend If has been used on a layer, except when no other effects have been used on that layer.
It would be a great idea if they were shown as you have them.
Here is a script for you to play with, best I could do.
#target photoshop
hasBlendIf();
function hasBlendIf(){
if(!documents.length) return;
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
var desc = executeActionGet(ref);
if(desc.hasKey(stringIDToTypeID("layerEffects"))){
    desc = executeActionGet(ref).getObjectValue(stringIDToTypeID('layerEffects'));
    if(desc.hasKey(stringIDToTypeID('scale'))){
    if(desc.count == 1) {
        alert("This layer looks like it has 'Blend If' applied.");
        return;
            }else{
                alert("This layer may have 'Blend If' applied.");
                return;
alert("This layer does not have 'Blend If' applied.");