Section type widgets are the functions associate with a section in the detail of a record. They are used to manipulate unstructured data.
A section is the container of a widget, a widget can change the data of the section.
This documentation describes the common functions related to section type widgets.
Add a widget
When saying add a widget, it actually means add a section with a particular widget. A widget can be added when adding a section. See here for more details.
The default set of widgets can be added directly when creating a new record. See here for more details.​
Custom widget menu
The widget menu is customizable in detail view. Include those commonly used widgets in the menu, can speed up your documentation process. See detail here.