We’re starting off the New Year with new ways to work with Office! We’re improving the inking experience so writing and drawing with your finger, pen or stylus are more intuitive and powerful. We’re bringing PowerPoint Designer and Morph,available last month in Windows, to additional platforms. Also, Office 365 consumer subscribers with Macs can now get Office Insider builds for first access to new features.
Read more at source: https://blogs.office.com/2016/01/21/new-to-office-365-in-january-new-inking-tools-collaboration-improvements-office-insider-builds-now-available-for-mac-and-more/