I could not find any limitations listed on adobe's main site...
But... I found this on their UK site... at:
http://www.adobe.co.uk/products/tryadobe/m....html#photoshop
Limitations of Adobe Photoshop Tryout:
* This Tryout is for demonstration purposes only and does not include person-to-person technical support.
* The Photoshop 7.0 Tryout includes full online documentation. To access it, start Photoshop 7.0 Tryout, then choose Help & Contents.
* The Photoshop 7.0 version does not enable you to save, export or print artwork.
Hope this helps.....