You can delete a panel at any time.

If there are references to the panel in other panels (e.g. in placeholders) they will be listed to the right. You can click any in the list to go to the appropriate page and remove the reference.

Alternatively, click “Open As A Checklist” and the current page is opened again in another browser window. This page can then remain open while you go to each link to fix the references.

It is recommended (but not enforced) that you remove data references. If not, they will show as the placeholder text, e.g. {myPanel.myField}.