(click to zoom)

I want to add a (click to zoom) underneath the picture in the detailed product page.  I change the product vairiant and nothing happens?

What do you mean add a (click to zoom)?

Just the wording under the pic

ProductBox1.ascx and/or ProductBox2.ascx is where the image is displayed. Just add (click to zoom) under the image like so:

    <div class="picture">
        <asp:HyperLink ID="hlImageLink" runat="server" />
        <br />(click to zoom)
    </div>

You may want to enclose it in a <span> or something and add some formatting or whatever... like to center it or right align it...

Still not showing up.

edit your product template (folder  templates/products )
eg
VariantsInGrid.ascx
OneVariant.ascx

        <div class="picture">
            <a runat="server" id="lnkMainLightbox">
                <asp:Image ID="defaultImage" runat="server" />
            </a>
            <br />        (click to zoom)
            <asp:ListView ID="lvProductPictures" runat="server" GroupItemCount="3">
                <LayoutTemplate>

Still not working.

What version are you using? Also, what template?

1.9 and I have switched between the 2 templates. And have changed both template files but nothing.

found it modules/productinfo.aspx
That's what needed to be changed.