Let us suppose that you want to find all of the revisions made by one of the Monotone developers, mtn-dev@zackw.users.panix.com, since the beginning of February 2009, but you do not understand Monotone's query syntax. This is how you would go about constructing the query:
Make sure that Advanced query is selected.
Check that the Search term combobox entry field is empty.
Select Author in the selector term combobox.
Enter mtn-dev@zackw.users.panix.com into the adjacent argument entry field.
Left click on the button to insert that selector term into the Search term combobox entry field.
Select Logical And in the selector term combobox.
Left click on the button to insert that selector term into the Search term combobox entry field.
Select Date (>) in the selector term combobox.
Use the calendar to select any date in February 2009.
Left click on the button to insert that selector term into the Search term combobox entry field.
Edit the Search term combobox entry field so as to remove the time and day fields and any trailing hyphen from the end of the value inserted by the previous step.
Left click on the button to execute the query.
Assuming that you then selected a revision listed in the Revisions panel, then you should end up with an Advanced Find dialog window looking something like that shown in the figure below.