There are 2 methods of archiving or deleting a graph.
Method 1 - via Edit Graph
Method 2 - via Manage Graphs Settings
Method 1 - Edit Graph
Hover over 3-dot menu
Choose Edit Graph
Choose Archive or Delete.
Method 2 - Manage Graphs Settings
Go to Settings
Choose Manage Graphs
Status shows which graphs are Active or Archived.
Actions allow you to Edit/Archive/Delete
To restore an Archived graph, choose Activate.
You can also search for archived graphs and restore them:
Note: Archived graphs are stored for free and do NOT count against your monthly subscription.
Calculated Graphs & Archived Graphs
The values in an Archived graph are still included in a calculated graph.