Via this page you can keep a list of dive types and dive activities you are frequently using.

Add dive type
Choose a dive type from the type list by clicking on the name and click "Add". The dive type will be selected for your dive.

Add a new type
Click the button "New" and fill in the new dive type in the input box. Click "Add" and the dive type will be automatically selected for the dive.

Delete your dive type
To undo your choice, select the dive type from the list and click the button "Delete".

To remove a dive type permanently, choose the dive type and click "Remove".

The activities are handled the same way.