Fields & forms
Every field type, validation, formulas and anchor tags.
Every field type, and when to use itAll fifteen field types explained, with the rules each one enforces.
Anchor tags — place fields by writing them into the documentPut a marker like {{sign:1}} in your template and the field lands there automatically.
Validation, conditional fields and formulasCatch bad data as it's typed, show fields only when relevant, and calculate totals.
Collecting payment at signatureTake money by UPI or Razorpay as part of the signing ceremony.