The related list in Lightning Experience can have show only 4 fields as of now whereas you could have 10 in Classic. This may make
Category: Lightning App Builder
Collapsible Related List in Lightning Experience
When your related list keep growing on any object page layout, It does not looks good as Users might need to scroll down more. Do
Open Activities and Activity History Related List in Lightning Experience
As migrating to Lightning from Classic, You will get confused with the way task, event and log a call are different in Lightning. In Classic,