To enable bar tabs, log into the management console
Go to Settings (Advanced view) --> Table service settings, and locate the "bar tabs" option. Check it and click the save on the bottom of the page.
In the same section (Table service settings), it is possible to choose how many pages of bar tabs that are desired to be shown on the POS station, with the maximum of three.
Go to the "pages of bar tabs" section and from the drop down menu select the desired number.
Click save and refresh the POS station(s) in order for the changes to take effect.