Step 1
drag legend widget, drop it on map right top corner, then resize to align it with existing map wiget.

 
 
 
 
 
 
 
 
 
Step 2
click drop down arrow, set legend widget source as current map. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Repeat 1, 2 but for layer widget.
 
 
Step 3
drag layer widget, drop it on map right top corner, then resize to align it with existing map wiget.

 
 
 
 
 
 
 
 
 
 
 
 
Step 4
click drop down arrow, set legend widget source as current map. 
Turn on these radio button, if you want, default is off.

 
 
 
 
 
 
 
 
 
 
 
 
Step 5
Don't forget save. Then click publish button. Then click view published item. 

 
 
 
 
 
 
 
 
 
 
 
 
Step 6
I should change title, you actually completed create a new experience builder in 3 minutes. 

 
But the other minutes I can talk about configure Search widget to search parcel APN, and address number. 
 
The other minutes I can talk about add nearmap to it. You don't have to listen if you don't have nearmap available.