Switch to the Format tab under Picture Tools, click Crop in the Size option group, and select Cloud Callout in the Drop-down list that pops up.
 At this point the picture border has been adjusted to the style of the cloud callout, but not very satisfied with the main display position, we can click Adjust in the Crop Drop-down list.
 Close to the cloud-shaped callout border, hold down the left mouse button, and the cursor changes to the 10 glyph to drag to change the size of the cloud callout. adjust to fit.
Tip: You can customize other styles, stars, torches and the like, cutting tools inside have to choose. When you adjust the border style, note that the border does not exceed the bounds of the picture, or cropped out of the picture will be missing corners, not good-looking.
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