On PPT slide, remove part of the saved annotations and keep the rest

During a PPT presentation (one slide), I made some annotations on the slide using a digital pen and I saved all annotations at the end of the presentation.

Now I need to remove parts of the annotations and keep the rest. How can I do this?
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Hello ThereSystem AdministratorCommented:
If you did't make a lot of changes I would delete them one by one. There is no Office function for this.
Another way is to use your backup pptx file and delete the one you edited.
Member_2_7966563Author Commented:
Hi Hello there,

There isnt an option to delete annotations one by one. All annotations show up as a single group, and I can only delete the entire group and be left with nothing at all. There is also no option to ungroup the annotations.
In newer versions of PowerPoint (specifically Office 365 with a subscription, and you may need to be running on Windows 10 with at least the Creator's Update), you can use the "convert to shape" option on your annotations.

After you've drawn the annotation and have gotten back into editing view, click the annotation and then click it again to get a little interface object over on the upper right. This lets you change from annotation to shape. After you convert the annotation to shapes, click away from the selected objects and then select them one at a time. This will help you delete what you don't want, and you can even use things like Edit Points to remove and adjust little bits of the annotation.

convert annotation to shape
In previous versions, you may be able to copy the annotation and Paste Special as EMF then ungroup the EMF to get at the bits and pieces as necessary to delete what you don't want.

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