[Scribus] pdf annotations: where do I get the actual "check style" ?

[Zhang Weiwu]

Hello. As far as I can understand, pdf annotations, like checkbox, 
buttons, are just normal text boxes. I can set "check style" in pdf 
Field Properties, which only affect what will be filled into the center 
of the text box when user checked the checkbox.

I could never get the checkbox look, like the square around the check, 
or the unchecked diamond. This way I can never make a checkbox looks 
real like an clickable item. The only thing I can do is to set the 
border 2pt and fill nothing in the checkbox, so that it looks much more 
like something checkable.

Hope my English is not too bad. I mean, I could make document look like 
this:
http://www.scribus.org.uk/documentation/images/acro3.png

But I could not make it look like this:
http://www.realss.com/public/acro3.png

Any hint?