Create Exhibition
'Free' accounts can only have one 'Exhibition' and this is created for you automatically when you register, you can 'Edit' your 'Exhibition' to change the pictures and text. Upgrade your account for the option to add more exhibitions.
With any paid for account go to the 'Project' page that you want to add a new 'Exhibition'. Below the current exhibitions you will see a blue button 'Add New Exhibition', click to add a new 'Exhibition' to the 'Project'. If the button does not appear you may have reached the maximum number of exhibitions you are allowed under your current plan.