How to create a business channel on Telegram? (Tutorial) The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. How to create a business channel on Telegram? (Tutorial) Done! Now youโre the proud owner of a Telegram channel. The next step is to set up and customize your channel. To upload a logo, click the Menu icon and select โManage Channel.โ In a new window, hit the Camera icon.
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