A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. 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. 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 channels fall into two types: Select “New Channel”
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