OneNote has two useful keyboard shortcuts for bulleted and numbered lists, namely Ctrl+. and Ctrl+-. Is there something similar for PowerPoint where the work with lists is also very common? Haven't found anything here: Use keyboard shortcuts in PowerPoint.
You can refer to the below link
here they have given steps to do this.
Yes, just hit ALT, H, N, N to open the Bullets and Numbering dialog box.
You can then hit ALT + T to jump to the “start at” input box if you want.
These work regardless of your version of PPT.
If you want to see it demoed, watch the video on one of our blog posts here: https://nutsandboltsspeedtraining.com/create-continuous-numbering-across-your-objects/
(full disclosure: I run this website, but it's the only place I know that demoes this shortcut.)