<
https://docs.asciidoctor.org/asciidoc/latest/document/header-ref/>
I think `nofooter` is a specific **Asciidoctor** head attribute.
Asciidoc & Asciidoc3 don't suppor `nofooter` attribute after I had some test by change myLeoSettings.leo.
Step1: use asciidoc3
```
@@string vr3-prefer-external = asciidoctor
@bool vr3-prefer-asciidoc3=True
```
Result: Not support :nofooter:
Step2: use asciidoc
```
@@string vr3-prefer-external = asciidoctor
@bool vr3-prefer-asciidoc3=False
```
Result: Not support :nofooter: