Gmail has 4.2 billion users. But only 0.1% know how to use it effectively. Unlock their secrets with these 10 hidden tips: 🧵

1) Undo the email you just sent. See below how to undo it: → Settings icon (top right). → Settings > General → Activate the "undo sending" option → Choose 30 seconds

2. Get rid of promotional emails. → Type "unsubscribe" in the Gmail search bar. → Now, select all emails with the unsubscribe label. → Now just tap on the delete button to delete them all.

3. Send confidential email. You can make your email confidential by disabling the copying, printing and forwarding functions. To activate them, click on the padlock symbol when sending a new email.

4. Check your Gmail offline. Follow these simple steps to enable Gmail offline mode: → Log in to your Gmail account. → Click the gear icon or "Quick Settings". → See all settings and click on them. → Select "Offline".

5. Use Gmail with keyboard shortcuts Shift + I: mark as read. ✔ ⌘ or Ctrl + Enter: send an email. ✔ ⌘ or Ctrl + K to insert a link. C to compose ✔ / to search your emails D to write in a new tab

6. Send your email later Want to look like you're at your desk at 10 o'clock at night? you can do exactly that: → Click the down arrow next to "submit". → Choose "Schedule send". → Choose the date and time you want

7. Snooze an email. Do you have an email you don't want to deal with right away? → Click on the clock icon on the right. → Choose how long you want to snooze the email. → It will reappear in your inbox on that date.