How to Write a Script to Create a Text Layer with Two Different Fonts in Photoshop JSX

Doing this is a **MAJOR** pain with Extendscript. It requires Action Manager code or you always get the same type settings for the entire layer.

Below is a demo script, you would need to modify it to select the part of your text you want to format differently. I have it splitting the string on a return but you would want to use a space.

This script is provided as-is, you are on your own with it!!!!

/*
Utility Pack Scripts created by David M. Converse ©2018-24

This script demos formatting a text layer

Last modified 7/22/2024

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#target photoshop

layerUpdate();

function setFormatting(start, end, fontName, fontStyle, fontSize){
    var idsetd = app.charIDToTypeID('setd');
    var action = new ActionDescriptor();
    var idnull = app.charIDToTypeID('null');
    var reference = new ActionReference();
    var idTxLr = app.charIDToTypeID('TxLr');
    var idOrdn = app.charIDToTypeID('Ordn');
    var idTrgt = app.charIDToTypeID('Trgt');
    reference.putEnumerated(idTxLr, idOrdn, idTrgt);
    action.putReference(idnull, reference);
    var idT = app.charIDToTypeID('T   ');
    var textAction = new ActionDescriptor();
    var idTxtt = app.charIDToTypeID('Txtt');
    var actionList = new ActionList();
    var textRange = new ActionDescriptor();
    var idFrom = app.charIDToTypeID('From');
    textRange.putInteger(idFrom, start);
    textRange.putInteger(idT, end);
    var idTxtS = app.charIDToTypeID('TxtS');
    var formatting = new ActionDescriptor();
    var idFntN = app.charIDToTypeID('FntN');
    formatting.putString(idFntN, fontName);
    var idFntS = app.charIDToTypeID('FntS');
    formatting.putString(idFntS, fontStyle);
    var idSz = app.charIDToTypeID('Sz  ');
    var idPnt = app.charIDToTypeID('#Pnt');
    formatting.putUnitDouble(idSz, idPnt, fontSize);
    textRange.putObject(idTxtS, idTxtS, formatting);
    actionList.putObject(idTxtt, textRange);
    textAction.putList(idTxtt, actionList);
    action.putObject(idT, idTxLr, textAction);
    app.executeAction(idsetd, action, DialogModes.NO);
	}

function layerUpdate(){
    if(documents.length > 0){
        //declare demo variables
        var text1 = "test";
        var text2 = "test replacement";
        var oldtSize = 48;
        var tSize = 24;
        var tFont = "Calibri";
        var tStyle = "bold";
        var tLead = 24;
        var boxH = 200;
        var boxW = 400;
        var tColor = new SolidColor;
        tColor.rgb.hexValue = "FF0000";
        //end demo variables
        var originalDialogMode = app.displayDialogs;
        app.displayDialogs = DialogModes.ERROR;
        var originalRulerUnits = preferences.rulerUnits;
        var j = 0;
        try{
            var docRef = activeDocument;
            preferences.rulerUnits = Units.POINTS;
            var m = 0;
            for(var i = 0; i < docRef.artLayers.length; i++){
                var LayerRef = docRef.artLayers[i];
                if(LayerRef.kind == LayerKind.TEXT){
                    var TextRef = LayerRef.textItem;
                    TextRef.textComposer = TextComposer.ADOBESINGLELINE;
                    var layerText = TextRef.contents;
                    var newText = layerText.replace(text1, text2);
                    if(newText != layerText){
                        j = i;
                        TextRef.contents = newText;
                        if(TextRef.size == oldtSize){
                            TextRef.size = tSize;
                            TextRef.font = tFont;
                            TextRef.useAutoLeading = false;
                            TextRef.leading = tLead;
                            TextRef.color = tColor;
                            var l = TextRef.contents.split(/\r/);
                            docRef.activeLayer = LayerRef;
                            setFormatting(0, l[0].length, tFont, tStyle, oldtSize);
                            preferences.rulerUnits = Units.PIXELS;
                            if(TextRef.kind == TextType.PARAGRAPHTEXT){
                                TextRef.height = boxH;
                                TextRef.width = boxW;
                                }
                            preferences.rulerUnits = Units.POINTS;
                            break;
                            }
                        }
                    }
                }
            }
        catch(e){
            alert(e + '  ' + e.line);
            preferences.rulerUnits = originalRulerUnits;
            app.displayDialogs = originalDialogMode;
            return;
            }
        preferences.rulerUnits = originalRulerUnits;
        app.displayDialogs = originalDialogMode;
        }
    else{
        alert('You must have a document open to run this script.');
        return;
        }
    }