To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. Those being doxxed include outgoing Chief Executive Carrie Lam Cheng Yuet-ngor, Chung and police assistant commissioner Joe Chan Tung, who heads police's cyber security and technology crime bureau. To edit your name or bio, click the Menu icon and select “Manage Channel.” How to Create a Private or Public Channel on Telegram? 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.
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