Go to the list of documents, click on the Edit button at the upper right of the screen, select the files you want to move, click the Move icon, click the "Move selected documents" popup, and select the folder you want to move the files into. You may have to create a folder first by clicking the "Create a folder" icon after you click the Edit button and enter a name.
Thanks for the quick reply! Just after I submitted my question, and before I saw your reply, I tried exactly the same steps and everything worked as expected. However, earlier in the day I tried the same procedure but the file move will not take hold. In fact, I think this version of Adobe Reader is not very robust. I already had a couple of situations in which the Edit action did not show the edit icons. The only way to get past this was to shut down the iPad, turn it on, and then try again! Thanks again.
Europe, Middle East and Africa