Under the "New Item" icon, select the "Images (batch)" option 
 

Follow the directions in the dialogue box that appears, choosing whether you wish to upload images into a new or existing folder.
 

Click on the "Upload Multiple" button to browse to the desired images on your computer and select which ones you wish to upload. 
 

Once images are selected, click "Open" to begin the batch upload process












NOTE: due to memory constraints, there is a limit of 50 images or 150MB of image data that may be uploaded in any single batch. Use multiple batch sessions to load more images.