How to create a business channel on Telegram? (Tutorial) Image: Telegram. 5Telegram Channel avatar size/dimensions 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. To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon.
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