Several parameters in various
%key:value% syntax, which are called Supplier Keychains.
The parameters which support this are marked as such in the relevant macro documentation page. This allows you to inject Supplier values into the parameter, based on whatever the context of the macro is in.
You can also do this multiple times, or within the context of other text, in which case it will result in a Text value, as shown in the following example:
Where the full Value is:
Created by %page:creator > user:name% on %page:creation date > date:dd-MMM-yyyy%