The query designer generates a SQL command. The TOP clause is part of the SQL Select command syntax.

The following is a simple example of its use:

select * TOP 10 ;
from MyTable ;
into cursor MyCursor

OR

select * TOP 10 PERCENT;
from MyTable ;
into cursor MyCursor

If you select Query->View SQL from the FoxPro menu when the query designer is running then you can see exactly the effect the interface objects/selections have on the code.