How can I cross-reference non-template elements?

[karl-an]

Description

I have some exercises in my lecture slides that I want to number across slides and cross-reference.
I would like to

## Task {#task-first_task}

Open R.



## Task {#task-second_task}

Close R.

and later cross-reference it as
Please solve [@task-first_task] first.

How is that possible?

Thank you and best regards

[cderv]

Possibly #4944 will allow this. cc @cscheid

[cscheid]

Yes. Keep an eye specifically on "control numbering of anchor crossrefs".