It’s actually quite easy to move a snapshot to a different board :

1. Clic on the snapshot you want to move to another board

2. Clic on the “move dashboard” icon that should appear to the right

3. Select the dashboard where you want to move your snapshot to

4. And voila !

For more details, check the video below :

https://www.loom.com/share/2983d5e170b34b3cae801928144b7d54?sid=9f990dac-0f97-49b2-945e-bf80798a67b9