Getting Started
Download
You can download Microsoft Mix for free if you have a Boston University account with a Kerberos password or if you have a Microsoft account. Go to https://mix.office.com/ , click on "Get Office Mix", and select which way you want to sign in.
Office Mix should install Mix as an "Add-In" to your PowerPoint.
Start PowerPoint and select the Mix tab from the menu bar at the top.
You should then see the Mix menu options shown below.
You may also see links to "Quick Start Tutorials on the right side of your screen. If you don't, click on the "Using Mix Tutorials" option on the Mix menu at the top.
Slide Recording
This is a very useful option. It allows you to record audio and/or video of your PowerPoint slides while you narrate them and annotate them using your mouse or other pointing device as a pen. The audio and video can then be reviewed and saved to the cloud or directly to your local computer as a .mp4 file. You can start with a blank slide and annotate it to create a Khan Academy type presentation, or you can retrieve a previously saved PowerPoint presentation and narrate it while making annotations. To start, click on "Slide Recording" at the upper left corner.
This should open a screen like the one below (I already have chosen a PowerPoint slide in this illustration.)
Note the "Record" and "Stop" buttons at the upper left and web cam and audio controls on the far right. You can choose just audio or audio + video (meaning recording your voice and your web cam), and you can choose whether the web cam video will play as a thumbnail insert or full screen. The microphone icon shows the volume of your audio when you speak, and the slide bar beneath that allows you to adjust the volume.
Beneath that are pens of different thickness and options for pen color. Note that the pens and eraser will not become functional until you begin recording.
To begin recording, click on the red "Record" button at the upper left. You will then see your drawing tools arrayed vertically on the right as shown below. The drawing tools and the eraser should now be functional.
The controls at the upper left, 
enable you to pause/resume or stop recording.
Note also that when you are recording a PowerPoint presentation with multiple slides and animations, the recording screen provides buttons to activate an animation if it is present on a given slide, and another button enables you to advance to the next slide. These controls are shown below.
When you are done, click the 
button at the upper right to close the recording screen.
This will bring you back to the Mix menu, where you can choose the Preview button 
to review your recording. When you are satisfied, you can upload it to OneDrive with this button. 
Once the file has been uploaded, you can choose with whom you would like to share it.
Alternatively, you can export it and save it as a .mp4 file on your local computer by clicking on this button 
. Note that processing and saving these files may take some time depending on the length of the presentation and the resolution that you choose for the video.
When you choose to export the recording, you will first get the screen on the left below. Note that the default is "Full HD with 1080" pixels. If you click on the chevron to choose video size, you get the options shown on the right below.
