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.
You have definitely been through number of form filling request especially in the forms and membership sites. Most of the web sites store some personal information about the users. When operating your own web business you must have thought of doing so. Its very true that forming these forms is boring and time consuming. But what about creating these web form templates? Does it take huge time to create professional templates for your users? Well, the answer is definitely_ NO.