•To show the stroke palette (GN4 term: Rule & Dash), on the Window menu, point to Palettes sidebar, and then select the Rule & Dash.
•To hide a palette, repeat the above.
•If the palette is docked in the Control palette, click its tab to bring it in the foreground.
See also
For more information about R & D palette: Page editing palettes
How to define cap styles: Defining cap style