Creating a new style sheet/theme for a PDF
PDF’s come with a default style sheet (globally scoped) that defines the text size, color, font and spacing.
You can change that to suit a your preference for branding etc.
Steps
Go to the Templates page
Go to the Document/PDF tab
Double-click on the row for the Cost-Certified PDF theme (CSS) file
Change the name to something, for example to the name of your company
Scroll through the body of the CSS document to see the data used to style the documents.
CSS is a programming language for styling websites and documents, see https://developer.mozilla.org/en-US/docs/Learn/Getting_started_with_the_web/CSS_basics for some basic information on how to edit CSS.
Warning: if the CSS is invalid it can cause your document to not generate
Make the desired CSS changes to the different elements of the document
Save your CSS document
Close the CSS document window by clicking Done on the bottom right
Now refresh the documents list, you should see your new style sheet there
Now open a PDF document (like a quote pdf) you previously made by double clicking on its row
Go to the Settings tab on the sidebar
From the settings tab, select the CSS document you just created from the Theme dropdown menu
Now Save your PDF document, and it will now be loaded with your new CSS theme!