If you scan a file, or upload your faxes into Synapse, then these files can be several Mbs in size. There is thus an appreciable delay in viewing them as the whole file needs to be downloaded first before it can be viewed in the browser. I am considering convertiing multipage tifs to jpgs to speed up the download process. So when you ask for a file, you get the first page as a jpg, and the other pages download in the background. Of course the resolution won't be as good as the original, so there will be an option to download the original if you need to send it to someone or print it off. PNG gives a better image than JPG, but JPG is significantly smaller file size.