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. Add up to 50 administrators 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. 1What is Telegram Channels?
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