The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. How to Create a Private or Public Channel on Telegram? To view your bio, click the Menu icon and select โView channel info.โ To upload a logo, click the Menu icon and select โManage Channel.โ In a new window, hit the Camera icon. Click โSaveโ ;
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