Maximum no of fields that are allowed in quick view?

Now users can gain quick access to the most relevant details of a record through QuickViews, this allow users to make changes to a record without actually opening it. By using this standard out-of-box functionality users can view, edit and even take actions (Approve, Decline) on record.

Key points:

It allows to add a maximum of 20 fields.

Doesn’t allows to add sublist fields (e.g. Item of Sales Order)