Group constraint baffling me

In my group I have a simple ".>= 0"
This "should" prompt the user to input a valid value if the input is less than 0.
How can I get it to work if the user don't enter anything inside the text box? I don't want to set the default as 0, otherwise it display on the screen. Can I hide the default value?

Set the field to be required -- then the user will be forced to enter
something before continuing. Then, once they enter something, the
constraint will kick in.

Best,

Chris

ยทยทยท On Tue, Sep 16, 2014 at 8:27 AM, wrote:

In my group I have a simple ".>= 0"
This "should" prompt the user to input a valid value if the input is less
than 0.
How can I get it to work if the user don't enter anything inside the text
box? I don't want to set the default as 0, otherwise it display on the
screen. Can I hide the default value?

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