You should have one (1) rule in Form Editor » Custom CSS

The Custom CSS box is good for one thing, and that’s loading external stylesheets. But you have to do it right.

Your choice: Scylla, Charybdis, or returning 𝑛𝑢𝑙𝑙 in Velocity

Velocity loosens Java’s rules about types and nulls, but that causes more confusion than good.

Properly trimming Strings in Velocity takes more than trim()

It’s almost certain that Velocity’s (that is, Java’s) trim() doesn’t do what you consider “trimming whitespace.”

Show Known Visitor HTML on other open tabs after a form submit

A fun use for BroadcastChannel, a browser feature typically used by web apps (not mere LPs).

Creating DNS CAA records for Marketo-hosted domains

If you can make IT happy with minimal impact, do it. (But stay skeptical of claimed “security issues” in any MAP, as they’re usually false alarms.)

Adding hidden fields (e.g. UTMs) to Marketo Dynamic Chat dialogues

They’ll tell you it can’t be done. But they didn’t count on the power of having no social life.

Avoid log purge surprises with “Last [Activity] Week Ending” fields

You’ll wish you’d done this 90 days ago.

Yes, you can use Velocity in the native Preheader area, just not the way you’re used to

Welcome to Workaround Town. Ain’t no documentation-believin’ newbies round here.