Hi:
When you use the SAS Add-in to Office with Powerpoint as part of the BI Platform, Powerpoint will only "accept" SAS Report XML results from the stored process. Even if you have ODS HTML in your code, or you do an override for the &_ODSDEST reserved variable, when the results come back, SAS detects that the client application is PowerPoint and your results are turned into SASReport XML. I believe that your device of GIF will probably be changed to the device driver that is used for PowerPoint (probably PNG or ACTIVEX or JAVA driver -- I'm not sure).
There are some regular ODS options that can be used for non-stored process SAS/Graph and ODS jobs: they are the ODS USEGOPT statement and the GTITLE option on the ODS statement. However, I am not sure that either of those abilities are used by the SASReport XML that PowerPoint receives.
This is probably a question for Tech Support -- as they can look at your complete code and your PowerPoint settings and if they cannot help you get the title into the SAS/Graph image, then they can help you change the CSS style that is used with the Add-in and PowerPoint to make the title the size you want.
cynthia