How do I make a field mandatory in LiveCycle Designer Ver 11.0.0?  I need the box to be ticked before it can be saved.Many thanks in advance for any help.

I need to have two forms open at the same time in LiveCycle.  Is this possible?  If so, are there any drawbacks.Timely amswers would be helpful - I have an urgent deadline!Many thanks in advance.SallyNew