Creating a canvas or a list in Slack is a great way to share information and get work done with your team, but some information isn’t meant for everyone. Read on to learn more about sharing canvases and lists and assigning permissions to determine who can access them.

Understand access permissions

Here’s an overview of the visibility and access permissions for canvases and lists:

• Only invited people can access (default)
  The canvas or list won’t appear in search results or be visible in the   Canvases or   Lists browser for anyone it hasn’t been shared with.
• Can view
  People with view access can open a canvas or list and grant others view access (unless limited sharing is on). Those with view access to a canvas cannot make changes or comments, but people with view access to a list can add comments in list items’ threads.
• Can edit
  People with edit access can open a canvas or list and grant others view or edit access (unless limited sharing is on), plus make changes and add comments.
• Limited sharing
  If a canvas or list owner limits sharing, only they can grant view and edit permissions to other people. People with the link to the canvas or list will be able to request access.
  

Note: If you share a canvas or list set to Only invited people can access in a public channel, it will be visible to everyone in your workspace or Enterprise Grid organization.

Access level and role-based permissions

Use the table below to understand who can view, edit, or share a canvas or list based on their level of access. If limited sharing is enabled, only the person who created the canvas or list will be able to grant others view and edit access.

If you...	Then you can...
Created a canvas or list	• Grant people view or edit access • Share the canvas or list with other people • Limit sharing • Revoke access to the canvas or list • Delete the canvas or list
Can edit a canvas or list	• Share the canvas or list with other people • Grant people view or edit access** • Revoke access to the canvas or list
Can view a canvas or list*	• Share the canvas or list with other people • Grant people view access

*Guests can only view or edit canvases and lists that have been shared in channels they belong to.

**External people who can view or edit a canvas or list cannot grant access to others.

Note: Owners and admins can delete any canvas or list they can view.

Share a canvas or list

When you share a canvas or list, you can control access in three ways:

• Add specific people or channels
  Decide who should have view or edit access.
  
• Set general access permissions
  Determine the level of access for people who haven’t been specifically added.
  
• Limit sharing
  Prevent others from granting view or edit access.

Add people or channels

Set general access permissions

By default, the general access permissions for canvases and lists you create will be set to   Only invited people can access. The permission you choose for your canvas or list will apply to anyone who finds it in the canvas or list browser or has the link. 

Limit sharing

You can decide if you’d like to prevent people with access to your canvas or list from sharing it with others. If you enable limited sharing, members can request view or edit access.

Note: Owners and admins can enable limited sharing for all canvases and lists in their workspace or org.

Change or remove access

If you have edit access to a canvas or list, you can remove or change the access permissions for the people and channels it’s been shared with unless limited sharing is on. 

Manage access requests

People who don’t have permission to view or edit a canvas or list can request access. Canvas and list owners will receive a direct message (DM) from Slackbot when someone requests access.