How to search in Label and Notebook

Windows/latest desktop version.I know that in version 1.79 there was added support for searching within a Label or Notebook(folder).But I don’t know how to do that.Are there any instructions?
For example I have two Notebooks,Main and Test.How do I look up notes only in Test?

In general when a new feature is released,such as this,where do you get instructions on its usage from?Is there like a manual that I’ve been missing?
thanks

Currently the search allows “title:” and “body:”. So it would be reasonable to add “notebook:” and “tag:” as well.

Is this what you two are looking for?

Yes!
thanks very much

On second thought…
I have a Notebook called Spring and I want to search notes that contain the word “keystore”.
go to anything-
@spring keystore
@spring /keystore

don’t work! what is the correct syntax?
thanks

You can only search either by notebook title or by note title, but not both.

... and the ability to use CTRL+G to search body text using / does appear to have been merged but has not been released yet.