This is useful if you uploaded a keynote speaker photo in portrait mode and you want to adjust it so that the head is nicely centered, for example, the Jane Goodall photo below:
Crop the image
Click on the image, then click on the Crop icon:
You will see the cropping menu:
The crop menu allows you to:
Zoom in/out (click and hold for fine grained control)
Scale to fit (return to the original image)
Submit your changes (or simply click out)
Click and drag the image to reposition it.



