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. Informative Step-by-step tutorial on desktop: 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.
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