Cannot reproduce this problem. Set the Default Layout as '4 Tabs - Horizontal Grid' and click on the Tile Tabs WE toolbar button to create a 2x2 grid layout of 4 tabs. This should work.

Please provide the following information and e-mail to: dw-dev@gmx.com

- Which operating system are you using?
- Which version of Firefox are you using?
- Which version of Zoom Page WE are you using?
- Do you have any other 'tab management' or 'window management' add-ons installed?
- Please attach screenshots of the Tile Tabs WE Options (both options tabs).