This is useful to show certain questions only to certain registration types or to charge costs that are conditional to certain registration types.
Different types of conditions
While certain mandatorty fields like first name, last name and email can't have conditions, most form fields do.
You can add a condition on those fields to either:
Show the field
Hide the field
There are two types of conditions:
If Any of a group of fields are selected. That is if at least one other field is selected
if All of a group of fields are selected. That is, if all the selected fields have been selected.
Show a question only when anoter option is selected
Below is an example where the Choice of menu is visible only if the participant answered Yes to the Keynote dinner attendance question.
Edit the Choice of menu question.
Go to the Conditions tabs, and toggle on Conditional.
Select Any. In this case, because only one option will be selected (Diner: Yes) the All option could've been selected as well).
Select the field that will trigger the Visible condition, Diner: Yes.
Here's what this looks like: