5Telegram Channel avatar size/dimensions To edit your name or bio, click the Menu icon and select “Manage Channel.” The Channel name and bio must be no more than 255 characters long Telegram desktop app: In the upper left corner, click the Menu icon (the one with three lines). Select “New Channel” from the drop-down menu. Don’t publish new content at nighttime. Since not all users disable notifications for the night, you risk inadvertently disturbing them.
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