1. Select the menu icon (top right corner)
2. Select "Performance Tools"
3. Select the date of the performance you wish to modify
4. Select 
icon
5. Select "Tables"
6. View "Held" and "Unheld" tables by selecting the tabs at the top of you table list
7. Select "Held" to view the list of held tables.
8. You can choose to "Unhold" all of your held tables by selecting the "Unhold" button
9. To "Hold" all of your open tables, select the "Unheld" tab
10. Select the "Hold" button to hold all open tables
9. Select "Save Changes"