We are creating an app where we want client to adjust (customize) the viewable grid form based on their prefrence.
So in some casses we want to show the grid 20 minutes.

For example 1 to 2 PM would have 3 time slot each for 20 minutes instead of 30 minutes. However, if another client want to set these slot to 30 or 40 minutes they could also do it.

So that can happen in this control?  

Hello,

In Day, Week and MultiDay Views you have the MinutesPerRow property, which controls exactly how many minutes each row represents. You can try it out in our online demo:
http://demos.telerik.com/aspnet-ajax/scheduler/examples/day-week-multi-day-views/defaultcs.aspx

In Timeline View you can use the SlotDuration property, also shown in this demo:
http://demos.telerik.com/aspnet-ajax/scheduler/examples/timelineview/defaultcs.aspx

Regards,
Bozhidar
Telerik