How can I replace .gif format for multiple image names to .png in FM in one go.

Hi, here is how you can do it for a single file. It's a little more complicated for a whole book... if you don't have that many chapters, it might be quicker just to run the script on each file manually. Hope this helps. -Russ

function graphicsGifToPng()
{
    var counter = 0;
    var graphic = app.ActiveDoc.FirstGraphicInDoc;
    
    while(graphic.ObjectValid())
    {
        if(graphic.constructor.name == "Inset" &&
           graphic.InsetFile != "" &&
           graphic.InsetFile.indexOf(".gif") > 0)
        {
            var path = graphic.InsetFile;
            path = path.replace(".gif", ".png");
            graphic.InsetFile = path;
            counter++;
        }
        
        graphic = graphic.NextGraphicInDoc;      
    }
    alert("Script complete. " + counter + " graphic(s) adjusted.");
}