Open a Pop‑up Form Based on a URL Parameter
In some cases it might be useful to show a pop-up form directly on page load when a specific URL parameter is set. Below you'll find instructions how to do this.
In this example we'll assume the query parameter used is ?showform=true
Instructions for v100.10.0 and up:#
Go to the edit form page in the admin area and add the following code to the Custom Javascript > Arbitrary JS - on page load field:
if(window.location.href.indexOf("showform=true") != -1){
this.form.button.click();
}
Instructions for v100.9.4 and lower:#
Go to the edit form page in the admin area and add a custom class name to the form at Front-end Style > Custom CSS Class(es)
In this case we'll add the class auto-open to the form:

Now add the following code to the Custom Javascript > Arbitrary JS - on page load field:
JavaScript
if(window.location.href.indexOf("showform=true") != -1){
jQuery('.auto-open').parent().parent().find('a').click()
}