How do I create a global action in Salesforce?

rom Setup, enter Actions in the Quick Find box, then select Global Actions.
Click New Action.
Select the type of action to create.
Customize the action.
For a Create a Record action, select the type of object to create. If the object has more than one record type, select the one you want to use for records created through this action.
For a Custom Visualforce or Custom Canvas action, select a Visualforce page or canvas app, and then specify the height of the action window. The width is fixed.
For a Lightning Component action, select the component to be called by the action.
Enter a label for the action. Users see this label as the name of the action.
Tip
TIP You can choose an option from the Standard Label Type list to have Salesforce generate the label. For the labels in this list that include “Record” and “Record Type,” Salesforce fills in the type of object or the record type the action creates. For example, if you choose the Create New “Record” standard label on a create contact action, the generated label is Create New Contact.
If necessary, change the name of the action. If you selected a standard label type in the previous step, you must enter the name.
This name is used in the API and managed packages. It must begin with a letter and use only alphanumeric characters and underscores, and it can’t end with an underscore or have two consecutive underscores. Unless you’re familiar with working with the API, we suggest not editing this field.
Type a description for the action.
The description appears on the detail page for the action and in the list on the Buttons, Links, and Actions page. The description isn’t visible to your users. If you’re creating several actions on the same object, we recommend using a detailed description, such as “Create Contact on Account using New Client record type.”
For a Create a Record or Log a Call action, select whether you want a feed item to be created when the action is completed.
For a Create a Record, Update a Record or Log a Call action, you can add a custom success message that displays after the action executes successfully.
Optionally, click Change Icon to select a different icon for the action.
Custom images used for action icons must be less than 1 MB in size.
Click Save.