Send one
Contracts → New contract. Choose a template, pick the customer, and fill the guided fields — the template decides which ones you are asked for.
Send it, and the customer gets a link to read and sign. You see when it is signed.
Templates
Manage templates. If you have none, Install the starters and edit them into your own words.
You can also bring in a contract your business already uses: paste it in and mark the parts that change per customer as fields.
After signing
A signed project-type contract can be turned into an invoice and a project in one step, so the work starts from the agreement rather than from somebody retyping it.