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. Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” 5Telegram Channel avatar size/dimensions Hashtags Select: Settings – Manage Channel – Administrators – Add administrator. From your list of subscribers, select the correct user. A new window will appear on the screen. Check the rights you’re willing to give to your administrator.
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