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. Step-by-step tutorial on desktop: Image: Telegram. Telegram desktop app: In the upper left corner, click the Menu icon (the one with three lines). Select “New Channel” from the drop-down menu. Today, we will address Telegram channels and how to use them for maximum benefit.
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