Custom HTML
Custom HTML is a block of HTML you write yourself. Drag it from Layout. Most emails do not need it. Use Heading, Text, and Button unless you need markup those blocks cannot make.



| Field | What it changes |
|---|---|
| HTML | The markup. It is required. |
| Open editor | Opens a larger HTML editor. Apply writes it back. Cancel closes without applying. |
HTML in email is easy to break in some inboxes. Prefer the other blocks when they can do the job.