As an Admin, you have the possibility to access designs, create a sub-design and change the logo.
Create Sub-design
Click on System → Designs → Click on the three dots by the name of the already existing design → Add Sub-design → Give a name and click on Save.
Change the logo
If you need to change the logo for a certain design, then go to your System → Designs → On the right side of your screen, there is Logo → Click on Upload under Header Logo to import a new logo in the header → Click on Upload under Cover Page Logo to import the new logo of your cover page.
Note: We encourage you to resize your logos before importing them. The recommended size for a header is 250x64px.