To edit your name or bio, click the Menu icon and select “Manage Channel.” Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” To view your bio, click the Menu icon and select “View channel info.” 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. 5Telegram Channel avatar size/dimensions
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