If you are submitting a Word document containing a number of large images, you may wish to compress these when you save.  If your document is only slightly larger than the 40mb that Turnitin allows, try saving it as a pdf, as this will automatically reduce the file size!
We recommend that you create a copy of your original file before compressing, and always check the quality of images after you have reduced the file size.
To do this:

1. Click File.
2. Click Save As.
3. Type a new name for your file to create a copy.
4. Click on a picture and choose 'Format' > 'Picture Tools'  above the ribbon.
   
    
5. In the Compress Pictures pop-up window... You can then choose an output size.  If your original document is very large you might need to check the E-mail option to significantly reduce your file size.

         6. Click OK.

         7. Check the quality of your pictures, ensuring all content is still accessible in the compressed document                  and ​save​ again.