Once you have one picture styled the way you like, you can use the Format Painter to apply the same style to another picture.
With the formatted picture selected, click the Home tab.
Click the Format Painter button.
Single-click the Format Painter button to apply the copied formatting once. Double-click the Format Painter button to apply a copied format multiple times.
The cursor now has a paintbrush symbol next to it, indicating the Format Painter is turned on.
Click another picture.
The same style and formatting is applied to the selected picture.