The Standard Channel To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. To edit your name or bio, click the Menu icon and select “Manage Channel.” 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 delete a channel with over 1,000 subscribers, you need to contact user support
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