Formatting: headings, images, buttons

You write your email as readable text; formatting is a light layer on top. The toolbar inserts the syntax for you, and the live preview shows exactly how it renders—but it helps to know what the marks mean:

• ## Section heading—a section heading with an underline rule (use # for one big top heading)
• **bold** and *italic*
• [label](https://link)—a labeled link
• ![caption](image-url)—an image, centered, with the caption underneath
• [button: Get the book](https://link)—a real button, in your brand colors
• - item at the start of a line—a bulleted list (1. item numbers it instead); the toolbar's Bullets and Numbers buttons do this for you
• > quoted line—a block quote: indented, with a rule down the left, for setting someone else's words apart from your own. The toolbar's Block quote button does it for you; click it again to turn the lines back into normal text
• >> quoted line—a Scripture block: italic, inset, with a rule above and below, so a passage reads as lifted out rather than leaned against. The toolbar's Scripture button. The two look different on purpose, and either button turns a block of the other kind into its own—no need to undo first
• --- on its own line—a dashed divider. === is the solid one. The toolbar's Dashed and Solid buttons insert them
• => at the start of a paragraph—first-line indent (==> and ===> deepen it). The toolbar's Indent and Outdent buttons; they do not change a block quote or a Scripture block
• The Font picker applies a web-safe typeface to the selected text, or to the whole email when nothing is selected. Email clients only honor system fonts (Georgia, Times New Roman, Arial, Verdana, Trebuchet MS, Courier New)—not uploaded or web fonts
• A blank line starts a new paragraph

Images

Use the toolbar's image button to upload straight from your computer—images are resized and compressed automatically. Click an image to pick its size—quarter, third, half, three-quarter, or full width (in the raw text, extra ! marks and a digit spell the same thing: !4 quarter, !3 third, ! half, !! three-quarter, !!! full)—and selecting an image then clicking Link makes it clickable—handy for book covers.

Why it works this way

Every email is sent in two forms: the formatted version, and a plain-text version derived from the same source (links become "label (url)", buttons become "Label: url"). Spam filters like emails that carry a good plain-text part, and some readers prefer it—you get both for free by writing this way.