> For the complete documentation index, see [llms.txt](https://docs.stackerhq.com/stacker-astra/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stackerhq.com/stacker-astra/security/add-user-permissions/create-or-edit-a-permission-rule/permission-sharing.md). # Permission Sharing By default, permissions apply to all users. You can restrict which roles a permission rule applies to, by switching from **Everyone** to **Some users**. If you're not using [User Roles](https://support.stackerhq.com/hc/en-us/articles/4409591860243-Set-up-User-Roles), then you will only be able to select the default **'User'**. This means that all users in your app will be given the same level of access. If you are using custom **User Roles**, you can choose to apply a permission rule to one or more of these Roles. By creating [Multiple Permission Rules](https://support.stackerhq.com/hc/en-us/articles/4409598072979-Multiple-permission-rules), you can give different permissions to your users based on their Role - by applying different User Roles to different permission rules.