When creating a new estimate, click Save and Sign from the action menu at the bottom of your screen upon filling in all the estimate details.
(or)
When you have an estimate saved as a draft, open the Estimates module from the left sidebar, select the estimate that you want to sign, and click Sign Estimate.
Preview your e-signature in the following pop-up and click Sign Estimate.
Verify that the estimate was digitally signed when sending it to the customer.
