Under the Users tab there is a table where you can link the current (loaded) start page to one or several users and groups. This is done by selecting the check box in the column Use [n] as start page. It is also possible to only show user rights groups in the table by checking the check box Show only groups.
In the Current start page column you can see the start page that the user/group in question currently is using as start page. If it says "(standard)" in this column it means that the start page which is configured to be used as the standard start page on the heading row.