The Settings tab will allow you to make global changes to your marketing piece.
From this area you can change the width, background color, content area background color, default font, and link color. These properties will apply to the full marketing piece, however you can also adjust this on a more granular level on specific rows, or content items.
To do so, click once on the row, or the content, and find these options under Row Properties or Content Properties respectively. Settings applied to a row or content will override any global settings set under the "Settings" tab described in this article.