This How-to is a small part of a much larger article. Please click here for the complete Photo Stream on iOS article.
#1 – While browsing a photo select the “arrow action” button on the bottom left corner.
#2 – Select the Photo Stream icon.
#3 – Select the Photo Stream you want to add the photo to.
#4 – Add a caption (if you wish) select the “Post” button when you are finished.
Your photo will be posted in the shared photo stream.
View the Photo by selecting it; read and make additional comments if you wish.