Google Docs Margins is an easy way to change the margins of a document to get it ready for print. This app lets you choose from several common paper sizes and custom margins for your own documents, then generates a PDF version. Google Docs Margins is a new feature in Google Documents. It allows you to change the margins of your document or a single page. You can change the margins to make it bigger or smaller, if you want to print and bind your document together. As well as save yourself from any mistakes when you are writing, by setting an outline for your document.