Clearing form fields when changing selections

Hi,

I have another question about the event registration form i am creating. If participants choose an all day session, they cannot attend the morning or afternoon sessions. If they choose morning and afternoon sessions, they cannot attend all day sessions. BUT I need them to see all the options in order to choose. I'm worried if they "browse" and make a selection in one time frame and then they choose something from the other time frame the first choice doesn't get cleared out....hopefully i am being clear in my question....thanks!

The form is set to clear the hidden field values by default on submission. If you wish to clear the fields on being hidden, simply change that in the preferences.

Preferences > Advanced > Show More > Clear Hidden Field Values set to Clear on Being Hidden:

Note that your conditional logic is correct. You can do the same for other radio button options, only show the fields when an option is selected. 

I hope that helps.