4How to customize a Telegram channel? 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. How to create a business channel on Telegram? (Tutorial) best-secure-messaging-apps-shutterstock-1892950018.jpg To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon.
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