CSS to change entire app font

Is there a CSS to change entire font of the application. I am using this

#knack-body {
font-family: Arial, Helvetica, sans-serif

But its not working

I haven't tried it - but I assume it would be:

#view_2 {

font-family: whatever !important


It worked thank you very much. I have another question. Is it possible to do font change for only one page or view.


.kn-content {

font-family: WHATEVER