To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS): 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 edit your name or bio, click the Menu icon and select “Manage Channel.” Channel login must contain 5-32 characters
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