The free Chrome app is a limited version of Gliffy Online, therefore it does not have as many features or capabilities. We unfortunately won't be doing any updates to the Chrome app currently as explained here: http://support.gliffy.com/entries/66515614-Chrome-App-Updates-Not-Planned. We are choosing to focus our efforts on our online product.
If you are looking for additional capabilities, we would recommend Gliffy Online.
If you do not have a Gliffy Online account, please start a free trial here.