Elon Musk's Twitter profile displayed on a computer screen and Twitter logo displayed on a phone screen are seen in this illustration photo taken in Krakow, Poland on April 9, 2022. (Photo by Jakub Porzycki/NurPhoto via Getty Images) As Twitter’s newest board member and largest shareholder, Elon Musk is already floating suggestions for changes he’d like to see on the social media platform.In a series of tweets late Saturday, the Tesla and SpaceX CEO said that the company should include an "authentication checkmark" as a feature of its Twitter Blue premium subscription service, which costs $2.99 a month.Twitter adds a checkmark logo next to a user name when the account has been verified "authentic, notable and active."RELATED: Elon Musk to join Twitter's board, teases 'significant improvements'Musk also suggested Twitter make the authentication checkmarks of premium subscriber accounts different than those granted to official accounts belonging to public figures, for example.Elon Musk is now the largest shareholder of Twitter, purchasing a little more than 9% of the company this week, and then posting a poll on the social media giant asking if users want an edit button.