The autoname generator is used to automatically assign a number to the suggested measurement filename.
The first edit box gives the start number of the auto-numbering. The second edit box gives the number where the auto-numbering ends. When this upper limit is reached, the auto-numbering wraps around. So if you are to perform 8 measurements that should have the same name, but numbered 1 to 8, you should set this to 8. Then when saving measurement number 9 the Saving Defaults dialog box will be displayed and you may change the default name.
The current counter displays the current value for the counter. E.g. after successful saving of 5 measurements, the counter will have the value 5.