You may want to search the Forum/web, I expect there are some Scripts about for this task.
This one sets the position in pixels and not inches.
// add document name in text layer;
#target photoshop
if (app.documents.length > 0) {
var myDocument = app.activeDocument;
var originalUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
// getting the name;
var docName = myDocument.name;
//var basename = docName.match(/(.*)\.[^\.]+$/)[1];
//getting the location;
//var docPath = myDocument.path;
// make the layer;
var myLayerRef = myDocument.artLayers.add();
myLayerRef.kind = LayerKind.TEXT;
myLayerRef.name = "text";
var myTextRef = myLayerRef.textItem;
myTextRef.size = 14;
myTextRef.font = "Courier";
myTextRef.justification = Justification.RIGHT;
//Set text colour in RGB values
var newColor = new SolidColor();
newColor.rgb.red = 255;
newColor.rgb.green = 255;
newColor.rgb.blue = 255;
myTextRef.color = newColor;
// Set the position of the text - percentages from left first, then from top.
myTextRef.position = new Array( myDocument.width - 85, myDocument.height - 85);
myLayerRef.blendMode = BlendMode.NORMAL;
myLayerRef.opacity = 100;
myTextRef.contents = docName;
app.preferences.rulerUnits = originalUnits;
};
//that’s it; thanks to xbytor;
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