To filter the Aged Analysis to show only amounts over R10 do the following:
Click on the filter button to the right of the Total heading
Select custom from the drop down menu
In the Custom filter box select "Is greater than" then "10" in the amount field, then click OK
Your age analysis will only show values over R10 now.
If you've run statements and want to remove the filter when done, click the x on the bottom left corner of the screen. This will remove the filter.