Choosing a promotion type

Letterhead ships four default promotion types. Each of the first three below has a set of fields that promoters complete when designing and scheduling promotions. Two fields are required in each of those three: a promoter display name (so promotions are always clearly labeled as such) and a link address. The 4th type, HTML, works differently — see its section below. The character and dimension limits shown below are the defaults of the older, template-based promotions setup — see Changing the limits.

Text

Text-only: the promoter’s name, a heading, a short text section, and a call to action with a hyperlink.

• Promoter display name — up to 50 characters
• Heading — up to 50 characters
• Call to action — link text (up to 50 characters) plus the link address
• Short text message — up to 140 characters

Image with text

Everything in the Text type, plus a square image.

• Promoter display name — up to 50 characters
• Heading — up to 50 characters
• Call to action — link text (up to 50 characters) plus the link address
• Image — 300×300 pixels, 150kb max; jpeg, png, or gif; alt text required (up to 50 characters)
• Short text message — up to 140 characters

Banner

A wide clickable image with the promoter’s name — the image itself links to the destination.

• Promoter display name — up to 50 characters
• Link — the image sends the reader to this address
• Image — 728×90 pixels, 150kb max; jpeg, png, or gif; alt text required (up to 50 characters)

HTML

The 4th default type. Instead of filling in fixed fields, the promoter pastes custom HTML — including Google Ad Manager 360 newsletter tags — which Letterhead renders safely in the sent email. See How to use HTML Promotions for what’s supported and how it’s sanitized.

Showing a promotion on desktop, mobile, or both

In the composer’s conditions section, set a promotion block to display all the time, on desktop only, or on mobile only — so a wide banner can run for readers at a desk while a compact version goes to phones in the same newsletter. The editor’s desktop and mobile previews both honour the choice, and the delivered email follows it. Email apps that can’t measure the screen (Outlook on Windows) show the desktop version, so a mobile-only block stays hidden there. The switch happens at the newsletter’s own mobile width. Two-column promotion blocks are covered; a promotion nested inside a multi-column layout is not.

Changing the limits

Promotions you create in your company’s Promotions area have no setting to change a character limit. A few long-standing accounts still use the older, template-based promotions setup, where an admin can change a type’s character limit on its promotion template (Promotions → Templates, edit the template, update the content character count). New promotions made from that template use the new limit.

For everything else the Promotions area can do, see Finding your way around Promotions.