Simply go on Preferences => Themes. From there, you can change all logos using the upload forms : site’s logo, invoice and email logos, site icons, and mobile logo.
Let’s take an example with . First of all, opening the Theme’s preferences.
From there, to change the main logo, click on Add file button
Once the image has been selected on the computer, click Save in Prestashop. The new logo isn’t visible yet, but the file name on the computer is displayed.
After hitting Save button, an operation success message is displayed, meaning the logo has been uploaded and is now replacing the previous logo.
Open the website’s, and the new logo is there ! If you don’t see it yet, try clearing your cache / restarting your browser.