Update, March 26, 2022
Microsoft has introduced a new feedback portal to suggest features. To add a feature request or vote on current ones, head to feedbackportal.microsoft.com and scroll down to PowerPoint. The old UserVoice feedback site no longer collects feedback for Microsoft.
Ever wanted to suggest a feature to the PowerPoint team? Well, here’s your chance! The Office folks have started using
uservoice.com feedbackportal.microsoft.com so the user community can suggest and vote on features.
To add a feature request or vote on current ones, head to
powerpoint.uservoice.com feedbackportal.microsoft.com. Scroll down and select the PowerPoint forum. Use the filters to choose which installation of PowerPoint your comment relates to (PowerPoint for Web, PowerPoint for Windows, PowerPoint for Mac, etc.), and post your feature request. Then vote on the other posts you like by clicking the up arrow next to the number of votes.
I’m looking forward to seeing your suggestions at feedbackportal.microsoft.com! After you add your request on the website, post a link to it in the comments below so we know to vote on it.