To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. 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. 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 Private or Public Channel on Telegram? 1What is Telegram Channels?
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