Formstack Explanatory Text
How you provide explanatory text or instructions for your Formstack form will depend on whether your instructions apply to a single field or the whole form.
You should add instructions that only apply to one field as a legend in a field set. If it isn't properly marked as such, screen readers won't be able to read your content in "Forms" mode.
Whole Form Instructions
You should add instructions that apply to the whole form as content on the page, outside of the form. This ensures screen readers do not skip it and that the instructions are read before users begin entering information.
Do Not Use the Signature Block
Unfortunately, the signature block widget in Formstack is not accessible. If you need the person filling out the form to agree to something, you can use a check box instead of a signature. If you truly need people to sign the form, you will need to make the form printable.