Canvases in conversations will match the privacy settings of the channel or direct message (DM) they belong to. Members of your workspace can view any public channel's canvas. To view a private channel's canvas, they need to be in the channel.

A member's ability to edit the canvas in a channel or DM is determined by their posting permissions in that conversation.

A member's ability to view or edit a canvas depends on the permissions they've been assigned by the canvas owner, or another member with edit permission on the canvas. Anyone who can edit the canvas can also decide who can view or edit it. They can also set general access permissions that will apply to their entire workspace or Enterprise Grid organization.

When sharing a canvas, you can:

• Add people by name
  When you share a canvas with other members in your workspace, you can choose whether they should have permission to view or edit. Members will receive a DM letting them know they have access to the canvas.
• Add entire channels
  When you share a canvas in a channel, everyone in the channel will be granted the access permissions you choose. 
• Set general access permissions
  The general access permissions are the minimum access level for anyone in your workspace or org who come across the canvas without it being shared with them.

The levels of access are:

•   Restricted (default)
  A restricted canvas can only be accessed by the people or channels it's been shared with. It will not appear in search, or in the   Canvases view. This setting only applies to general access.
•   Can view
  Those with view access can read a canvas and its comments, but cannot make changes to the canvas or add comments. Members with view access can share the canvas with others, who will then have view access as well.
•   Can edit
  Those with edit access can read a canvas and its comments, make changes to the canvas and add comments. Members with edit access can share the canvas with others, and assign either view or edit access.

Anyone who belongs to the conversation can view the canvas, and anyone with posting permissions can edit it. 

When you're ready to share your canvas, you'll need to assign individual permissions.

Tip: On mobile, you can share a canvas by tapping the   three dots icon, then choose   Share in Slack.

If you were the last person to edit a canvas in a conversation, you can prevent others from making changes by locking it:

1. From any conversation on your desktop, click the  canvas icon to open and edit the canvas.
2. Click the  three dots icon then choose Settings.
3. Check the box next to Lock the ability to edit the canvas, then click Save.

Note: Anyone with posting permissions in the conversation can unlock the canvas to make edits.

If you need to, you can revoke or adjust access permissions for people and channels.

1. From a canvas on your desktop, click Share.
2. To change a channel's access, click the Channels tab. To change an individual's, click the People tab.
3. Choose the new access permission, then click Share.

• ✔ Yes
• ★ Yes, if the member is in the channel where the canvas was created
• ◼︎ Yes, if the member is in the channel and has posting permissions

* Can adjust the posting permissions in the channel to enable edit access

• ✔ Yes
• ★ Yes, if the member is in the channel where the canvas was shared
• ◼︎ Yes, if the member is in the channel and has Can edit access

• ✔ Yes
• ★ Yes, if the member is in the conversation where the canvas was created
• ◼︎ Yes, if the member is in the conversation and has posting permissions

* Can adjust the posting permissions in the channel to enable edit access

• ✔ Yes
• ★ Yes, if the member is in the conversation where the canvas was shared
• ◼︎ Yes, if the member is in the conversation and has Can edit access

• ✔ Yes
• ★ Yes, if the member is in the conversation where the canvas was created
• ◼︎ Yes, if the member is in the conversation and has posting permissions

* Can adjust the posting permissions in the channel to enable edit access

• ✔ Yes
• ★ Yes, if the member is in the conversation where the canvas was shared
• ◼︎ Yes, if the member is in the conversation and has Can edit access

Note: In Slack Connect, anyone who has been granted access to a canvas can share it. However, someone from the organization who created the canvas will need to assign view permissions to any additional external people.