How to Create a Private or Public Channel on Telegram? 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. How to Create a Private or Public Channel on Telegram? Choose quality over quantity. Remember that one high-quality post is better than five short publications of questionable value. To view your bio, click the Menu icon and select “View channel info.”
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