Hello Paul,

In general, all your html you can customize in the Template Editor and the Class Editor in the admin center.

As for the logo resize , it is in the same place in the calss top navigation in your Class Editor.

Please browse these 3 locations for all custsomizations:

Template Editor
Class Editor
Language Manager ->Edit Language

these 3 locations are everything you will need for customzations

Thanks

Mewsoft Support
www.mewsoft.com