Creating a new hatch style in Style Manager

Steps:

1. From ArcMap, click Customize > Style Manager.
2. Click the Hatches folder in the style tree in the ESRI style file (.style) in which you want to create a new hatch style.
3. Right-click the open space in the Style contents window, point toNew, then click Hatch.
4. Set the style’s properties on the Hatch Style Properties dialog box and click OK.
5. Name the new hatch style.
6. Click Close to close the Style Manager dialog box.