In Elementor, you can set a border for your element.
To add a border to your Element:
1. In Elementor, select the element for which you want to add a border so that a new dashboard on the left will emerge with the element's settings.
2. From the Advanced tab, go to Border section. Now you have full access to customization options of element's border. For instance you can set a border-type or add a border-radius to your element.
3. Change the settings and Update your layout.