How to check if they did a signature in NT

[rjolda]

Hi,
NT14.18   C11.0.136
In my app a SIGNATURE is required.  I have a Signature field.  How do I make sure that they sign before submitting the record?
IE - what do I check - maybe the prop:size of the image field?  Or something else?
Thanks,
Ron

[Bruce]

Interestingly the Signature field type does not come with a "Validation" tab. That seems like an oversight.
But basically yes, check the length of the field. If It's < 5 then it's "empty".
(There's some text wrapping, hence don't just check for length 0)