Select two or more elements.
Choose View→Style group→Style.
On the Style dialog box, in the Style Type box, click the style type that you want.
Note:
If you have selected several elements from different style types, the Style Type box is blank.
In the Style box, click the style that you want to apply to the elements.
Click Apply to change all the elements that you selected.
Tip:
If you select different types of elements, you can apply a style only to the elements that are in the style type that you selected on the Style dialog box.
For example, if you select several lines and dimensions on a drawing, you can apply a line style only to the lines. You cannot apply a line style to the dimensions.