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in a new window, under the tab "Devices" will be an option to control "auto-extend
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Q: How to have more information about used credits, how many left, get history?
A: You can see the remaining amount of credit by going to Administration -> Companies. Select the desired company and then go to Resource history. There you can see when credits were added and how many credits are left. You can also see when and which device has used up the credit after downloading the PDF file.