Processing twig in additional editor fields

Hi all,
I extended the default.yaml blueprint with a new tab in which I have an additional markdown editor field.
Now I'm wondering if it's possible to enable twig processing for this field, so that I could use something like this in it:

[[email protected]]({{ '[email protected]'|safe_email}})

This works in the main content editor if I have twig processing enabled, but not in additional editor fields.
Does anyone have a way how to enable it in all editor fields?
Thanks,
Beni

evaluate_twig will work:

test: "something {{base_url}}"
process:
    twig: true
- - - 

{{ evaluate_twig(header.test)}}