You can see how many Instant Galleries you have left by going to My Subscriptions in the My Stuff dropdown which is in the upper right hand side of the main page or the workspace.
Since Zno Instant is not a subscription, you will find your number of used and unused Instant Galleries in the Credits section.
If you are out, this is also a place where you can order more!
If our team can be of any additional assistance, please send us an email to support@zno.com or give us a call at 1-888-966-9539.