Press Alt+3 on numeric keypad to type heart symbol. Windows key+. (Period) brings up emoji keyboard. Click Symbols category to select heart symbol
Outlook recall feature allows undoing sent messages. Feature works only with Microsoft Exchange or Microsoft 365 accounts. Recalled messages can be deleted or replaced with new ones
Discord servers can only be joined through invite links. Invite links can be obtained from emails or game chat lobbies. Copy the link to your device's clipboard. Log in to Discord and click the + button. Paste the invite link and click Join Server
Supports multiple connections to up to 5 computers simultaneously. Encrypts communication using 256-bit AES and 1024-bit RSA. Works on Windows, Mac OSX, iOS, Android, and Linux platforms. Allows peer-to-peer connections with routing servers
Channels can have unlimited subscribers and permanent URLs. Supergroups support up to 200,000 members and can become geochats. Forums can be created from supergroups with distinct topics. Gigagroups are between channels and supergroups, with admin-only access
Gmail compose window allows adding recipients, subject, and message body. Recipients can be added to To, Cc, or Bcc fields. Subject should be brief but clearly explain message content