Change the Blending Options of a layer?

[jonohunt]

Something I do often is to change the Blending Options of folders (groups), and I wondered if it would be possible to run a script to do it instead of having to do it manually every time.

What I do after opening the Blending Options on the selected folder is to hold down the Option (Alt) key and drag half of the white slider on the right over to the left (changing  it on the right hand side from 255 to 0 / 255).

Is there a way to run a script to do this? Any help would really be appreciated

Here are some screenshots of what I do

[r-bin · Accepted solution]

blend_if(0,0, 255,255, 0,0, 0,255, "k");

////////////////////////////////////////////////////////////////////////////////////////////

function blend_if(db0,db1, dw0,dw1, sb0,sb1, sw0,sw1, ch)

    {

    try {

        if (db0 == undefined) db0 = 0;

        if (db1 == undefined) db1 = db0;

        if (dw0 == undefined) dw0 = 255;

        if (dw1 == undefined) dw1 = dw0;

        if (sb0 == undefined) sb0 = 0;

        if (sb1 == undefined) sb1 = sb0;

        if (sw0 == undefined) sw0 = 255;

        if (sw1 == undefined) sw1 = sw0;

        if (ch == undefined) ch = "krgb";

        var use_r = false;

        var use_g = false;

        var use_b = false;

        var use_k = false;

        if (ch.indexOf("r") >= 0) use_r = true;

        if (ch.indexOf("g") >= 0) use_g = true;

        if (ch.indexOf("b") >= 0) use_b = true;

        if (ch.indexOf("k") >= 0) use_k = true;

        var desc3 = new ActionDescriptor();

        var desc4 = new ActionDescriptor();

        var ref1 = new ActionReference();

        var list1 = new ActionList();

        ref1.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );

        desc3.putReference( charIDToTypeID( "null" ), ref1 );

        for (var i = 0; i < 4; i++)

            {

            var desc5 = new ActionDescriptor();

            var ref2 = new ActionReference();

            use_cont = false;

              switch ( i )

                {

                case 0: if (!use_k) { use_cont = true; break; } ref2.putEnumerated( charIDToTypeID( "Chnl" ), charIDToTypeID( "Chnl" ), charIDToTypeID( "Gry " ) ); break;

                case 1: if (!use_r) { use_cont = true; break; } ref2.putEnumerated( charIDToTypeID( "Chnl" ), charIDToTypeID( "Chnl" ), charIDToTypeID( "Rd  " ) ); break;

                case 2: if (!use_g) { use_cont = true; break; } ref2.putEnumerated( charIDToTypeID( "Chnl" ), charIDToTypeID( "Chnl" ), charIDToTypeID( "Grn " ) ); break;

                case 3: if (!use_b) { use_cont = true; break; } ref2.putEnumerated( charIDToTypeID( "Chnl" ), charIDToTypeID( "Chnl" ), charIDToTypeID( "Bl  " ) ); break;

                }

            if (use_cont) continue;

            desc5.putReference( charIDToTypeID( "Chnl" ), ref2 );

            desc5.putInteger( charIDToTypeID( "SrcB" ), sb0 );

            desc5.putInteger( charIDToTypeID( "Srcl" ), sb1 );

            desc5.putInteger( charIDToTypeID( "SrcW" ), sw0 );

            desc5.putInteger( charIDToTypeID( "Srcm" ), sw1 );

            desc5.putInteger( charIDToTypeID( "DstB" ), db0 );

            desc5.putInteger( charIDToTypeID( "Dstl" ), db1 );

            desc5.putInteger( charIDToTypeID( "DstW" ), dw0 );

            desc5.putInteger( charIDToTypeID( "Dstt" ), dw1 );

            list1.putObject( charIDToTypeID( "Blnd" ), desc5 );

            }

        desc4.putList( charIDToTypeID( "Blnd" ), list1 );

        desc3.putObject( charIDToTypeID( "T   " ), charIDToTypeID( "Lyr " ), desc4 );

        executeAction( charIDToTypeID( "setd" ), desc3, DialogModes.NO );

        }

    catch (e) { alert(e); }

    }

[jonohunt]

Perfect, thanks so much!