Mac OS displays the recently accessed applications, documents and servers in Recent Items section available under Apple menu.
The default number of recent items displayed on Mac is set to 10. But you can change the number of items displayed using the System Preferences menu. To increase or decrease the number of recent items displays, Launch the System Preferences window then click the Appearance under the Personal section.
In the Appearance window, navigate to Number of recent items section and using the corresponding Applications, Documents and Server controls you can increase or decrease the number of displayed recent items.