Thanks a lot for your prompt response. I really dont know anything about ArcGis online - someone introduced it to me today. I only have a regular Desktop ArcGis from my Institute. I wanted to superimpose a hydrological map on a base map but it was hard on my desktop (kept freezing) so I used ArcGis online it worked really well. Now it says in the FAQs that "You can save local copies of data files you've added to your organization. From My Content, open the item details for the data file you want to save, click the Open button beneath the item thumbnail, and click Download. Browse to a location on your computer where you want to store the file." So i logged in with an old ERSI password that I had and got the map but I cant download it as a png as there is no Download option. I want to place it in my powerpoint slide. I thought perhaps its a license issue so I wanted to know if having a desktop ArcGis from my Institution allows me to use ArcGIS online too.
Thanks a lot!