Invite up to 200 users from your contacts to join your channel 6How to manage your Telegram channel? To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. 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?
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