Vertical
When this style is set, the Tabs are positioned on the left side. When the 
Bottom style is also set, the Tabs are positioned on the right side.
Note - Under Java 17 tabs shown on the side of a Tab-Control appear slightly taller.
 
Example - Define a tab-control with vertical and text-norotate style
screen section. ...   03 screen-1-tc-1 Tab-Control      line 2.8      column 25.7      size 34.6 cells       lines 28.9 cells       help-id 1036      id 10      text-norotate      vertical      .  |