Edit the Current Web Part View

1) On the Announcements Web Part, click the arrow to the right of the Web Part title, and then click Modify Shared Web Part.

2) Click Edit the current view.

3) On the Edit View: Announcements page, in the Columns section, select the columns you want to display. Click the position from the left in which you want the column to appear.

4) In the Style section, select the style you want to display, and then click OK.