Sharing

You can share a Canvas, or a single Artifact such as a Card, with other Lino users. They can view it; they can't change it.

Open the Share dialog from the Canvas or the Artifact.
Type their emails in Emails to invite and invite them.
Or, under general access, switch from Only people invited to Anyone with the link. Anyone who opens the link can view it.

Sharing a Canvas shares what is on it as well.

The navigator's Shared tab lists the Canvases shared with you, grouped by where they live — someone's Lino, or a Team.
In the Artifacts Gallery, the filter menu's Shared with you lists the Artifacts shared with you directly.
On something shared with you, the button showing where it lives (its tile) opens a panel: Belongs to, what you can do, Copy link and Leave.

In the Share dialog, remove a person, or switch back to Only people invited.
Or in Team settings → People → Guests: open a person and choose Stop sharing next to one thing. See Your Team.

Your Team — members, guests and your first Team.