Click Share.
Then, click Share in Slack.
If it’s your first time sharing a document from Lumin through Slack, you'll be asked to authorize the integration. To confirm the authorization, click Authorize.
Review the access permissions and then select Allow.
Next, choose the Slack Workspace and the specific channel or individual you wish to share the document with.
Next, choose whether you want to share the document exclusively with the channel members or the selected user, or if you prefer to allow access to anyone with the link.
Then, set the Access level.
Then, click Share.