2How to set up a Telegram channel? (A step-by-step tutorial) To view your bio, click the Menu icon and select “View channel info.” To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. Telegram Channels requirements & features 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.
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