Content is editable within two days of publishing It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS): Don’t publish new content at nighttime. Since not all users disable notifications for the night, you risk inadvertently disturbing them. 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.
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