How to Create a Private or Public Channel on Telegram? To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel. Unlimited number of subscribers per channel 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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