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On the Home screen, you can see all your ready jobs and print them by tapping PRINT ALL.
You can also add new jobs to the list, by tapping the + (plus) icon next to Ready jobs.

You can see your account balance (displayed only if credit accounting is activated on the MyQ server).
By tapping RECHARGE, you can recharge your credit:

Enter the code from your credit voucher, and then tap RECHARGE.
If Quota is enabled on the MyQ Server, you can see all the quotas assigned to you and their current status in the Quota section.