Lightbox Pop-up form

Lightbox Pop-up form

I would like to embed my form using the lightbox pop up.  I don't want it to load automatically.  I want it to load when some clicks the button.  I can see this option, however when I use the "show pop-up launch button" on the website, the button automatically goes to the top of the page.  Is there anyway I can specify where on the page I would like the button to go.   I need it below some intro text in the middle of the page.  I can't find that option.