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. How to build a private or public channel on Telegram? Find your optimal posting schedule and stick to it. The peak posting times include 8 am, 6 pm, and 8 pm on social media. Try to publish serious stuff in the morning and leave less demanding content later in the day. 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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