Select one of these as your default invoice template by selecting Setup->Billing Options and Settings. Open the Appearance area and choose a new Default Template. You can also preview the invoice here too.
Upload your business logo to have it appear automatically on any of these templates. Select Setup->Business Information and click "upload your logo".
Templates titled "w/ CC Tear Off" will include an option to record credit card information as their payment. Selecting a template "w/ CC Tear Off & Login" will also provide instructions for the member to login and pay online - displaying their unique login and password. Don't accept credit card payment? Simply select a template "w/ Tear Off" only.
Pick your look from three different layouts: Clean, Crisp, or Classic, setting this template as your default. Select Setup->Billing Options and Settings. Open the Appearance area and choose a new Default Template.