To begin, navigate to the Toolbar > Edit with Elementor > Login Popup (the name of the template may be different)



 This popup screen opens up when you click on the user icon:



Or go to Templates > Popups > Login Popup (the name of the template may be different) > Edit with Elementor. 



Control the layout, conditions, rules and styles of the Side Menu popup template. 



Please check these guides for further information:

Read more about the Elementor Popups

Guide to Vamtam Elementor Builder