Xobor.com - official support forum

the center tag is not include by default.

To add it to the iconbar, follow these steps:

go to
1) Admin → Layout → Iconbar
2) Click on New forum code
3) Enter the code data as seen on the picture

4) If you want the code to be visible in the Iconbar, you can specify an image to be displayed (i.e http://www.bilder-hochladen.net/files/jrax-6-1679.png) (optional)
5) click Save to save your changes.

Which is one of the reasons why this is not a default-tag in our iconbar anymore

However - the center-tag still works fine in every browser and probably will continue to work in the future (much like the i or b-Tag).
Obviously the more correct solution would be something like (<div style="text-align:center">...</div>) but with the solution above it's less likely anyone will manage to add a typo while copying it to their forum...