Select: Settings β Manage Channel β Administrators β Add administrator. From your list of subscribers, select the correct user. A new window will appear on the screen. Check the rights youβre willing to give to your administrator. 5Telegram Channel avatar size/dimensions The optimal dimension of the avatar on Telegram is 512px by 512px, and itβs recommended to use PNG format to deliver an unpixelated avatar. Telegram Channels requirements & features βBanβ on Telegram
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