Power Automate New Expression Editor

Microsoft announced the new expressions editor for power automate recently. To switch it on go to Power Automate, Settings cog then click on the "View all power automate settings" link. Then toggle to on the Experimental features. Click Save.
In the compose action after clicking inside its input box two new buttons appear. The one to the right is the expressions editor. The one to the left opens the Dynamic selection picker box.
If we click on All Functions a browser window opens listing all the Power Automate functions available to us.
Enjoy!