Types of transactions by default

Hi All!

In my SM i have two type of knowledge article KNAR and ZNAR, in ITSM i click direct link "create knowledge article" and creates a new document, but i dont know which type of document use system to create a new document KNAR or ZNAR, where can i see or change types of transactions by default? in tcode dno_cust04 i dont find any parametr whitch links to knowledge articles.