Click the dropdown icon and then Permissions. Note that in the pop-up, the dropdown shows a list of available permissions. In the security user interface, administrators typically interact with "roles," which are named sets of permissions. The relationship between roles and permissions is described in detail in these topics:

• Role / Permissions Details Matrix - Details on the set of permissions provided by each role.
• Security Roles Reference - Provides the intent and function of each role.

Set the required permission and click Save:

By default, the system checks whether the user has the required permission in the current folder. To check the user's permissions against another folder, click Choose Folder and browse to the desired folder.

These settings apply to individual web parts, so you could configure two web parts of the same type with different permission settings.

Note that these settings do not change the security settings already present in the current folder and cannot be used to grant access on the resource displayed in the web part that the user does not already have.