One can simply use \setsecnum{A,1.i} to set the section numbering
format as Alph for the sections, arabic for the subsections and
arabic.roman for the subsubsections and
the secnumdepth and tocdepth will be 3.
If one want to set the tocdepth manually,
there is an option tocdep for it.
One may notice that the comma , plays a special role in the numbering format:
for deep levels, the numbering before the comma are hided.
Assets
3
The \setsecnum command now changes both secnumdepth and tocdepth because the two are usually the same in practice.
Assets
3
Slightly improved the documentation.
Assets
3
The first release of my package "secnum".