Hi @Anonymous User
When you click on the photo picture icon on the top task bar tools it should open a box and asks you to "choose a file" in green, click on it and then go to the picture folders on your phone and find the screenshots that you have saved.
Select the screenshot and then you should be able to upload the picture and insert the screenshot picture into the message box that you are posting on the forum.
Make sure when the screen shot is uploaded into the message box select the image size option button (I tend to use large most of the time) and click the green "done" button.
I own a Sony Xperia phone never to tried it myself, but this is how I upload photos onto the nowtv forum with my tablet.
Edit ~ Just tried my Sony Xperia phone and the example screenshot that I tested worked fine from the above instructions.
