You can easily apply a style to your inserted images. This can make your images look even better. It is easy to pick an image style when inserting an image.
Examples of included image styles/decorations below:
Line Border
Nice Border
No Decoration
Circle Style 2
Circle Style 1
Circle Style 3
Circle Style 4
Circle Style 5
Circle Style 6
Circle Style 7
Box Style 8
Box Style 2
Box Style 3
Box Style 4
Box Style 7
Box Style 6
Box Style 5
Box Style 1