[Preview don't need to enter parameters again.]

Hi hozawa, thank you for your answer, I try hard to find the option about "Is For Prompting" on the parameter, but still can't find it...

Could you please show me where those two options are? 

And I upload a image to show my page that need to enter parameters just once.

 

 

[Preview don't need to enter parameters again.]

I use Jasper Studio recently, when I edited my Main Report and went to "Preview" page, 

the system always ask my parameters, it shows "The report requires that you specify the value for some parameters before running it.".

How to setup and just enter my parameters once, if it can always remember my parameters and use them to show preview that will very convenient.