Remember: Navigate to the specific page according to the direction given in the documentation and follow the serialized direction from the screenshot based on the serial number (ascending serial).
Footer is a compulsory part of a theme. In Adlin, you have a couple of options to edit the Footer yourself.
The default footer of Adlin has two-part (Footer Top and Footer Bottom). You can edit the Footer top area from Appearance > Widgets and the Footer bottom area from the Theme Options> Footer.
You can edit the top part of the Footer from Appearance > Widgets > Footer Widgets. Take your widgets from the left side of the Available Widgets and place those widgets into the Footer Widgets area. See the Footer Widget area below-
3. You will find the Footer Settings under the Theme Options.