Mobile scheduler day view

Is it possible to change the height of each hour line in day view?
I mean instead of being 40px (for example), to be 100px

You can set the new width via scheduler.xy.scale_height (it is 20 by default):

scheduler.xy.scale_height = 50;
webix.ready(function(){
    webix.ui.fullScreen();
    webix.ui({
        view: "scheduler",
        id: "scheduler"
    });
});

http://docs.webix.com/mobile_calendar__sizing.html