To change the store logo shown in the customer store, perform the following steps. Login to your administrator control panel and select Billing from the top right corner.
From the left menu, select Online Store.
Your store configuration area will load. From the top menu select Design.
Select your store logo using the Choose file button and then save the change.
The file will be loaded onto the server. You need to push the changes to the live platform. To do this, select Summary from the top menu.
Now click Synchronize Now. The new logo will now be made live.