Personally I like to place my business address at the bottom of the page or the footer. To do this go to the floating bar and click on the button, 'Switch Between Header and Footer.' This will open a dotted box at the bottom of the document. You can type your office address here or anything you see fit for your letterhead. Again you can format the text by choosing the font, font size, color, align the text, etc.
What's Boilerplate? _ Boilerplate is standard text that you can use over and over again, example of this are copyright statements and disclaimers which are unlikely to change much between document iterations or releases. For those who work with multiple clients and routinely assign their copyright to those clients it's a good idea to have a unique template for each client reflecting their needs in these areas.