Navigate to the "Account" icon in the upper right corner of your browser window.
In the left column, click on "Order Settings."
Click the green "Edit" button to make changes.
You can set the number of days after creation, the Proposal will expire. The default is 14 days but you can change this to whatever you'd like.
You can choose to have your Proposals automatically change status to Canceled on their Expiration date or not using the tick box.
In this area, you can also choose the default Final Balance Due Dates for your Orders. It is pre-set to 10 days before the Event but you can change that to whatever works best for your rental business.
Click the green "Save" button when you're done editing to be sure to save any changes.