@grant2 is correct. But you also need to tweak Auto option options there, where you can customize that auto behaviour:
I use it often - it is visible variable for users. I use default auto value, but user can select own period and that will force aggregation based on current user needs.
Of course there is a risk that user will select options which may kill performance of used TSDB (e.g. 1min aggregation for last 2 days).