Improve the visual quality of an image you have added to your whiteboard by cropping your image.
https://www.wistia.com/medias/z9pg4c2f9n
To crop an image:
Click the image and select the Crop tool for the image's toolbar.
Slide the handles on the border of your image to your desired dimensions.
Deselect the Crop tool or hit Return on your keyboard when you are finished to accept your cropped image.