Picture Manager is not included with Office 2013 and later versions, but you can install it as a standalone app.
Install Picture Manager
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Download SharePoint Designer 2007.
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In the Choose the download you want page, select SharePointDesigner.exe and click Next.
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In the message (at the bottom of your screen) that asks if you want to Run or Save the .exe file, click Run.
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Accept the license terms and click Continue.
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On the Choose the installation you want page, click Customize.
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Expand Microsoft Office SharePoint Designer and select Microsoft Office Picture Manager.
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Click the drop-down arrow next to Microsoft Office Picture Manager and click Run from my computer.
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Click Install Now.
Edit pictures with the Photos app in Windows 10
Windows 10 has an app named Photos, a successor to Picture Manager that lets you edit photos. For information on how to open and use it, see Edit photos and videos.
Edit a photo you've inserted in an Office document
For information about editing a photo that you've inserted in an Office 2016 or Office 2013 document, see Editing photos without Picture Manager.