Missing validation when user removes all selections from checklist

[rteruyas]

I have an active report with data check list displaying list of values
I also have a presentation deck with 2 tabs.

plain text "Selection = all" when no value was selected from checklist
"%vList%" when user selects one or more values from checklist

I'm having some issues trying to validate this scenario
User selects from list "Business1"
   - Presentation deck displays %vList% as "Business1"
Then, user decides to cilck again on "Business1" (in theory, nothing is selected from checklist)
   - Presentation deck still displays %vList% as ""

Is there a way to show "Selection = all" after user removes the selected values

*** EDIT ***

In simple words, Id like to know if there is a way to use presentation deck and choose which tab to show when active report variable that is empty

[AnalyticsWithJay]

There's a Default Card property on the deck. When set to Yes, it will provide you with an extra deck tab that you could specify content in for when the variable does not match any of the interactivity conditions.

Wish there was a similar property for Variable Text Item as this is often requested. If you're asking about that, you'll have to use a method similar to the above to show "Selection = All" when the variable is empty.