Electronic Checklists (ECL) display both normal and non normal checklists on the MFD, which almost eliminates the need for paper checklists.
Looking at the pictures, the two checklists displayed are the PREFLIGHT and BEFORE START. Each item on these checklists is either a CLOSED LOOP or an OPEN LOOP item.
Closed loop action items cannot be ticked off manually, they’re automatically ticked off by placing the item in its designated position. For example, parking brake is set, ECL senses it, hence green,likewise, flight deck door, closed and locked, is green. But since beacon is not on, or trim is not set, it is sensed by the ECL and hence it’s white.
Open loop items on the other hand cannot be sensed by ECL and need to be manually ticked off by the flight crew. For example, the ECL cannot sense if the crew have finished their briefing (maybe in the future 😛🤨), so that has to be ticked off by us!