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. 4How to customize a Telegram channel? Telegram desktop app: In the upper left corner, click the Menu icon (the one with three lines). Select “New Channel” from the drop-down menu. To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. A vandalised bank during the 2019 protest. File photo: May James/HKFP.
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