Google Drive and Docs Tips
Customise your Styles in Google Docs
You can customise the look of headings and text in your document directly from your toolbar, and set the new styles as default for future documents.
Users can now customise their own Styles list, setting font, size, colour and more for Headings 1 to 6 - plus Title and normal text. To customise a heading, format some font in your Google Doc, then select it and go to the Styles menu on your toolbar. With the menu open, hover over the Style you wish to change and click on the right hand arrow, then select "Update Heading X to match selection". If you want the changes you have made to always be your default styles, go to "Options > Save as my default styles" at the bottom of the Styles menu.