ZDNET RECOMMENDS How to Create a Private or Public Channel on Telegram? The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. best-secure-messaging-apps-shutterstock-1892950018.jpg
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