Page permissions can be inherited from a "parent" folder or individual Page permissions (non-inherited), can be set on any Page from the Site Browser tab.
To view the permissions set on a Page, right-click on the Page from the Site Browser tab, then click "Page Properties". Now click on the Permissions tab next to the Page Advanced Properties tab.
Page Permission Inheritance from System Host
Below is an image of a Page that is inheriting all its permissions from the "System Host". This means that permissions on this Page, "parent" folder, and Site above it, are inheriting permissions directly from the Role permissons themselves set at the *System Host level.
*For more information on setting permissions on dotCMS objects from the System Host, please see the documentation on Role Permissions.
Setting Individual Page Permissions
While editing a Page, clicking on the Permissions tab and the "Permission Individually" button will stop any role inheritance coming from higher up the permission hierarchy and allows for permissions to be set on the Page itself.
*For more information on setting permissions on dotCMS objects from the System Host, please see the documentation on Role Permissions.