1. Dark Mode Customization: Take advantage of WhatsApp's dark mode customization options. Head to Settings > Chats > Theme > Dark to customize the dark mode appearance according to your preference.

2. Multi-Device Functionality: Stay connected across multiple devices with WhatsApp's multi-device functionality. Enable it in Settings > Linked Devices, and enjoy seamless messaging on your tablet, computer, and more.

3. Message Formatting: Enhance your message formatting by adding bold, italic, or strikethrough styles. Simply use asterisks (*) for bold, underscores (_) for italics, and tildes (~) for strikethrough.

4. Hidden Chat Archive: Keep your chat list organized with the hidden chat archive feature. Long-press on a chat, tap on the archive icon, and access your archived chats by scrolling to the top of the chat list and tapping on 'Archived Chats.'

5. Reply Privately in Groups: Respond discreetly in group chats by using the 'Reply Privately' feature. Hold down on a message, tap on the three dots, and choose 'Reply Privately' to send a one-on-one response.

6. Group Invitation Controls: Manage who can add you to groups by adjusting your privacy settings. Navigate to Settings > Account > Privacy > Groups and choose between 'Everyone,' 'My Contacts,' or 'My Contacts Except.'

7. Custom Wallpapers for Chats: Personalize your chat backgrounds with custom wallpapers. Go to Settings > Chats > Wallpaper > Choose a New Wallpaper to select from the default options or use your own images.

8. Animated Stickers and Emojis: Express yourself with animated stickers and emojis. Access the sticker store by tapping the emoji icon and then the sticker icon. Download your favorites for a more dynamic chat experience.

9. Disappearing Messages: Opt for a more ephemeral conversation with the disappearing messages feature. Activate it in a chat by tapping the contact or group name, selecting 'Disappearing Messages,' and choosing your preferred time frame.

10. QR Code Contact Sharing: Simplify contact sharing by using QR codes. Head to Settings > Account > Share My Account Info to generate your QR code, which others can scan to quickly add you to their contacts.