Use the app settings page to modify or delete charts. Doing so requires management permission for the app.

1. Display a chart of which settings you want to modify in the "View" screen.

2. Click the down arrow at the right side of the Settings button, and select Open Settings of This Graph.
   

3. Modify the chart settings, and click Save at the upper left of the screen.

4. Click Update App on the upper right side of the screen.

1. Click the app settings button at the upper right of the "View" screen.

2. Click the Graphs tab, and click Delete for the chart you want to delete.