In the File/Form Properties/Preview tab are you render as an interactive form or a print form?
It was a print form, I changed to interactive which fixed it.
thanks again Paul, you are a "diamond geezer"!
I have another problem.
I want to have my form select from sets of radio boxes.
I have two columns with multiple rows. On each row I want two radio buttons, each with mutual exclusivity.
At the moment I have this set up but I can select both at the same time and cannot deselect either.
I also need this to be 'mutex' but only for each row, if you know what I mean?
In the hierarchy there is a RadioButtonGroup for each radio button. Drag the radio Button object for the No value into the radioButtonGroup for the Yes value. Now you should only be able to select one.