...
From the top menu bar, select the tools and settings icon (the grey cog);
...
Select appliance settings;
...
Click manage matter types;
...
Wise Owl will create a list of all matter types available for your firm.
New matters can be added by selecting the new matter type button. 
...
How to make a favourite matter type
...
Follow the steps outlined above on 'How to view a full list of matter types'. From the matter type list select the matter you wish to favourite.
Change the sort order to -1000 and save.
...
When creating a new matter, using the down arrow on the matter type will create the drop down menu with your favourite matters starred to the top of the list.
...