Nibal,
Did you happen to see the nice little yellow bubble that popped up on the Help button asking if things looked different? Clicking the Help button on that new docked palette will open the Knowledge Base article on the Schematic tool. I have also linked to this page below. You will see a "What's New" video that will show you all the new functionality. That Knowledge Base article will also list all function of the new palette so you can read through how things now work.
If you have further questions let us know and we can go from there.

Schematic Irrigation