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. Informative 5Telegram Channel avatar size/dimensions Don’t publish new content at nighttime. Since not all users disable notifications for the night, you risk inadvertently disturbing them. 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.
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