Add-ins are supplemental programs that add custom commands or custom features to Office programs.
You can obtain add-ins for PowerPoint at Popular Office downloads or on third-party vendor websites. If you are a developer, you can write your own custom add-in programs by using Microsoft Visual Basic for Applications (VBA). For more information, see PowerPoint Solutions.
Add a PowerPoint add-in
If you download an add-in or if a co-worker or friend sends you an add-in, you can save it to your computer and then install the add-in by adding it to the My Add-Ins list.
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              Click File > Get Add-ins. Alternatively, you can click Home > Add-ins. 
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              You can directly install add-ins from this page or select More Add-ins to explore. 
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              In the Office Add-ins dialog. click My Add-ins tab to view your add-ins or click Store tab to explore add-ins for your PowerPoint. 
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              Select the add-in and click Add. 
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              Review the information and then click Continue to activate that add-in. 
Load a PowerPoint add-in
When you load an add-in, you start the add-in that you added to PowerPoint.
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              Click File > Get Add-ins. Alternatively, you can click Home > Add-ins. 
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              You can directly install add-ins from this page or select More Add-ins to explore. 
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              In the Office Add-ins dialog. click My Add-ins tab to view existing add-ins. 
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              Select the add-in from the list to load. If you are unable to view your add-in, select Refresh. If you are still unable to view, then you may have to install that add-in again. You can also upload any add-in from your device by selecting Upload My Add-in from the Manage My Add-ins dropdwon. 
 
                         
				 
				