You can resize your image either on the 'Quick Edit' screen or the 'Advanced Editing' screen. The process is the same.
Follow these steps to resize an image:
Step 1: Select the image that you want to resize.
Step 2: Drag the ends to resize the image the way you want it.
Step 3: Make sure you select the right resizing option from the 'Image Resizing Options' drop down. This ensures that your image looks best even after resizing.