Here is how to use Screenshot Tool:

1. Install the cloudHQ Chrome browser extension Screenshot Tool from this location: https://chrome.google.com/webstore/detail/gmail-screenshot/boepdnhlmfleonjnaoaemgcggppoikog:
   
2. Add the extension to Chrome:
   
3. Once installed in Gmail you will notice Screenshot Tool icon in the Compose Email toolbar:
   
4. Click ‘Screenshot Tool’ icon in the ‘Compose Email’ toolbar to see share window and capture your image. You can choose entire screen, window or Chrome tab:
   
5. You can highlight with box, add notes or blur some parts of your image. Click “Done” in the Screenshot Tool page to capture image:
   
   
6. The screenshot would be captured in your email. Click “Send” button in the Gmail to send email:
   

 
awesome screenshots;