Switching a campaign's template replaces its content
Choosing a different template for a campaign overwrites what you've written. EmailFig checks with you first, but there's no undo after you confirm.
Switching to a different template on a campaign replaces its content, not just its design. EmailFig checks with you first, but once you confirm there’s no way to get the old content back.
How it works
A template’s content is copied into a campaign once, when you apply it; after that the two aren’t linked. Editing the original template later doesn’t change a campaign that already used it, and choosing a different template overwrites whatever you’ve customised since.
On a campaign’s Template step, clicking Use template on any template other than the one in use replaces the campaign’s content. If you’ve made changes since the template was applied, you’ll see a confirmation first:
Switching templates replaces this campaign’s content — continue?
Confirming applies the new template and discards what was there. If the campaign has no content of its own yet, the swap happens with no prompt. Re-selecting the template already in use changes nothing.

Starting over from scratch (the Drag & drop / HTML buttons on the same step) works the same way, with its own confirmation: Start over with a blank email? This replaces the campaign’s current content.
Before you switch
Not sure? Save your current content first. Review → Save as template copies the campaign as it stands into a new template, kept safe whatever you do to the campaign afterwards. See Save a campaign as a template.