HTML Dialog Preview
The Html Dialog Preview gives you the ability to see the rendered output of a Html Dialog. If you preview a Html Dialog that you already opened with the process simulation, then it will restore the process data for the preview.
The preview is opened in the Developer Workflow UI frame with some tooling (Auto-Refresh and Element Navigation). It can execute dialog logic, so that the dynamic behavour of the dialog like validation or autocompletion logic can be tested.

Warning
The preview has some restrictions:
Previews of a Form Component, HTML Dialog Component and Static JSF Pages are not supported.
It uses a minimalistic implementation of a Task context, with the consequences that not every API is available.
Note that dialog logic is executed in the preview. This may manipulate your test data in the backend.
Accessibility
If you have a Form Editor or a HTML Dialog Editor open and
focused, a new button appears in the Toolbar Open Dialog Preview. Or use
the Play button in the Form Editor Toolbar.
Auto-Refresh
If you have a dialog open (via Preview or Simulation) in the
Developer Workflow UI and you make changes to the User Dialog View file, it
will trigger an auto-refresh of the view. State which is only represented in the
UI and is not hold in the data, will then be lost. This auto-refresh can be
disabled by clicking on the Disable auto refresh button in the
Developer Workflow UI.
Note
Some changes can not be refreshed. In this cases an Error will shown, and the preview needs to be restarted.