1/ Quick Edit timers:
You can go to the Products section, navigate to the Timer column and click on the Edit icon in each product line to edit the timer.
2/ Set up Global Timers for product taxonomies:
You can configure Global Timers for specific product taxonomies from WPClever >> Product Timer >> Global Timers tab.
3/ Copy/paste timers across individual products:
You can go to the Products section, navigate to the Timer column and click on the Edit icon in each product line, copy then paste that into the new one. When pressing the Update button, there will be a message if the setting was applied successfully.