To crop an image that you have added to your page, select the image, then choose the Crop Image option in the toolbar that appears above the image.

In Crop Mode you can click and drag the boundaries of the image and reposition it to fit the image's frame. If you're happy with how your image looks in the frame, click the blue check mark to save your changes.

You can reset your image to its original aspect ratio by clicking on the reset button in the toolbar that appears above the image.