1. Within eSignal 11 you can open tabbed pages, but the ability to have more than one page displayed at the same time is slated for an upcoming build of the program. I don't have an exact build number or date for this yet. You can however, close just one page at a time or you can close all tabs open currently by right clicking one of the tabs at the bottom of the screen and then selecting close all pages.
2. Yes, there is a way to calculate a moving average of a study. Once both the study and the moving average are added to your chart, double click the moving average line. On the edit chart window that pops up, select the drop down menu next to Price Source and select the study you would like the moving average of. If the study you selected is on a subchart you can close out the edit chart window and drag the moving average down the subchart as well.
Hope this helps