Paperwork is where a booking becomes real, so the whole path now works as one sequence rather than three disconnected tools.
One path from proposal to payment
Send a proposal, have it accepted, turn it into a contract, collect a signature, and invoice against it — each step carries the last one's details forward.
Executed documents stay put
Once a contract is executed or a proposal accepted, the underlying record is protected from being quietly edited afterwards. What your client signed is what stays on file.
Client-facing pages
Every document your client opens — proposal, contract, signing page, invoice, payment page — renders on your studio's branded letterhead.