There are six standard actions available on most standard and all custom objects: Tab, List, View, Edit, New, and Delete. In Salesforce Classic, these are all distinct actions.
Lightning Experience and the Salesforce mobile app combine the Tab and List actions into one action, Object Home. However, Object Home is reached via the Tab action in Lightning Experience, and the List action in the Salesforce mobile app. Finally, the Salesforce mobile app has a unique Search action (reached via Tab). (Yes, it’s a bit awkward and complicated.)
Names in Setup for Actions You an Override
This table lists the standard actions you can override for an object as the actions are named in Setup, and the resulting action that’s overridden in the three different user experiences.
Override in Setup
Salesforce Classic
Lightning Experience
Mobile
Tab
object tab
object home
search
List
object list
n/a
object home
View
record view
record home
record home
Edit
record edit
record edit
record edit
New
record create
record create
record create
Delete
record delete
record delete
record delete
“n/a” doesn’t mean you can’t access the standard behavior, and it doesn’t mean you can’t override the standard behavior. It means you can’t access the override. It’s the override’s functionality that’s not available.
There are two additional standard actions, Accept and Clone. These actions are more complex, and overriding them is an advanced project. Overriding them isn’t supported.
Note
How and Where You Can Use Action Overrides
Aura components can be used to override the View, New, New Event, Edit, and Tab standard actions in Lightning Experience and the Salesforce mobile app. You can use an Aura component as an override in Lightning Experience and mobile, but not Salesforce Classic.