To lock a chat go to Settings->Privacy and Security->Passcode Lock and enable it. Once you create a passcode and enable it, you will be able to lock and unlock your chats by tapping on the lock icon at the top right of the app. Mute a Telegram chat Edit Sent Messages
You'll have four options to choose from: Open Telegram Links in Your Favorite Browser Since non-secret chats and files are stored in the cloud, you can access them from any device by logging into your account. You will never have to worry about on-device storage or losing important files, but the trade-off is that you lose a bit of privacy and security. Customize the Look of Telegram
“Privacy” itself isn’t a particularly attractive product feature in online services. It can be nebulous: We can’t always feel or understand it, and sometimes it’s only when privacy is taken away that we take it seriously. Hopefully, I have listed enough Telegram features to help you understand why the Telegram app is so popular and secure. If you select the Scheduled option, the auto-night mode will kick in at a pre-defined time which you can change. If you select the Automatic mode, the auto-night mode will start depending on the ambient light. You can slide the slider to select at what percentage of the ambient lighting do you want the night mode to start at. Personally, I prefer the scheduling option, however, you can use the one you like. Another security feature that adds usability is usernames. Instead of giving people your phone number, you can simply give them your username. This gives you better control over what information is out there, and how people can contact you in the future.
Disabled: Turn off automatic night mode and always use the chosen theme. Use These Great Telegram Features to Become a Pro
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