How can i change app that i view pictures with

[herbmmm]

When I first started viewing pictures I was given a choice of two apps to use to view the pictures. Eventually I chose one to use as my default viewer. Now I want to change back. How can I do this?

 

[frunkiss]

Go to that app in Settings > Applications > Manage Applications
Choose the app. Under "Launch by default" tap "Clear defaults"