TabWidth

Specifies width of a tab. If set to 0 (default), width of tab will be automatically calculated.

property TabWidth: Boolean read FTabWidth write SetTabWidth default 0;
When width of a tab is calculated, this property is used first. If value of the property is 0, then TabWidth property of parent page control is used. If value of this property is also 0, tab width is calculated (best fit).