You are able to categorize an Item based on the Genre or Release information contained within the Item.
Note: This method can be applied to Ots and MP3 (with ID3v1 tags) Items that contain Genre and Release information.
Select the Item(s) you wish to categorize.
Right-click, select Category -> and select either Assign by Genre Info... or Assign by Release Info...
You will be prompted by
"This operation will add all selected items to categories based upon their genre. You will be prompted before any new categories are created. Do you wish to continue?"
Click the Yes button.
You will be prompted by the Create new category? dialog box.
If you are happy with the category click the Yes button.
Note: If you want a category to be displayed in the Media Library area click here for instructions.
How to categorize your music
How to categorize Albums based on Genre or Release Info