You can add a new custom query to the Fleet Management by clicking on the Navigation Panel Context Menu Add menu item. This will open the Custom Query Dialog in which you can specify the name, display columns, sort order and filter conditions for your query.
Once you add a custom query to the Fleet Management, the name will appear in the list of Custom Queries in the Navigation Panel.
Note that any custom queries that you create are visible to and can be executed by anyone running the Fleet Management.
You can delete a custom query by selecting the name you want to delete from the list and clicking the Navigation Panel Context Menu Delete menu item.