To add a new tab, click on the plus sign (+) in the upper right corner of the window. This action will replicate the entries of the current tab and create an Incorrect tab.
Change tab type
To change the type of tab, click on the icon next to the tab name. Even though it appears as a red X for the Incorrect tab, it will not close or delete the tab. Keep clicking the icon to cycle through Correct and Default tab types, then back to Incorrect.