Telegram desktop app: In the upper left corner, click the Menu icon (the one with three lines). Select โNew Channelโ from the drop-down menu. Select: Settings โ Manage Channel โ Administrators โ Add administrator. From your list of subscribers, select the correct user. A new window will appear on the screen. Check the rights youโre willing to give to your administrator. Image: Telegram. The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. Users are more open to new information on workdays rather than weekends.
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