5Telegram Channel avatar size/dimensions 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. To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. Image: Telegram. How to build a private or public channel on Telegram?
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