Hi @burkay_ozturk 

It sounds like you are describing Blackboard's "template variables" functionality. 

There is no built-in equivalent in Canvas.  A few Canvas administrators have come up with ways to do similar things in Canvas through editing the Canvas theme settings.  See https://community.canvaslms.com/t5/Higher-Ed-Canvas-Users/simulating-replicating-Blackboard-quot-tem...