Go to General Settings > Cart page
Enable cart notes: Check to display text box where user can enter special instructions to seller
Enable up checkout button: Check to display additional checkout button. Shown above the purchased item section
Cart type: User can choose between Page and ajaxify cart.
Ajaxify cart allows customer to remain in Product Page with a message to continue shopping or to go directly to the cart page.
Choose Page to go directly to Checkout Page. Make sure that "Skip Cart" is checked on Product Page setting
Cart Enable: Check to display cart expiration date. To customize text, timer settings and color go to General Settings > Cart page > Cart Page Timer