Hi @samytar97 -
This comes up a lot, it’s a great feature request, you can tag your post to +1 that. In the mean time here’s a workaround, Can I show an error message on dashboard when user enters wrong data in textfield filter in the Controls? - #3 by Tatyana_Yakushev
You can see it in action here, using Arena, just copy the analysis to check it out.
customized-message-based-on-an-control-selected/39986
