1. 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.
2, this time the picture border has adjusted itself to the cloud-shaped callout style, but not very satisfied with the main display position, we can click the "crop" Drop-down list in the "adjustment."
3, near the cloud-shaped callout border, hold down the left mouse button, the cursor changes to 10 when the drag to change the size of the cloud-shaped 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.