Chọn các tế bào ngay lập tức bên dưới hoặc bên phải của các giá trị bạn muốn đánh giá. 2. Trên tab Formulas, trong nhóm Thư viện Chức năng, nhấp vào mũi tên AutoSum, và sau đó trong danh sách, chọn Min. | 3 Working with Graphical and Multimedia Elements 379 Resetting or Replacing Images If you don t like the changes you have made to an image you can easily restore the original image. If you decide to try a different image you can simply replace it. To discard changes to a selected image To discard changes other than sizing on the Picture Tools Format contextual tab in the Adjust group click the Reset Picture button. To discard all changes including sizing display the Reset Picture list and then click Reset Picture Size. To replace a selected image 1. On the Format contextual tab in the Adjust group click the Change Picture button. 2. In the Insert Picture dialog box locate and double-click the replacement picture. Practice Tasks The practice file for these tasks is located in the PowerPoint Objective3 practice file folder. If you want to save the results of the tasks save them in the same folder with My appended to the file name so that you don t overwrite the original practice file. In the PhotoAlbum presentation on slide 2 crop both pictures to a portrait aspect ratio of 2 3 with the flowers centered. Then size and position them so that they take up most of the slide. On slide 2 increase the contrast of both pictures by 20 percent. On slide 3 crop both images to a square aspect ratio with the flowers centered. Then size and position them so that they are evenly distributed on the slide. On slide 3 remove the background of both pictures. Then make the flower on the left look like a line drawing and the flower on the right look like a smooth pastel sketch. 380 Exam 77-883 Microsoft PowerPoint 2010 Modify WordArt and Shapes Working with WordArt If you want to add a fancy title to a slide and you can t achieve the effect you want with regular text formatting you can use WordArt to create stylized text in various shapes. WordArt text can be stretched horizontally vertically or diagonally to shape it in fantastic ways. You can also apply additional formatting to .