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To edit your name or bio, click the Menu icon and select “Manage Channel.” To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. The Channel name and bio must be no more than 255 characters long 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. End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance.
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