title: change the color of a line or a word in a richtextbox?
body: <p>I can change the color of ONE line and/or ONE word perserving the other colors in the richtextbox?</p>
  
  <p>For example i want to change the line "Processing: ..." to yellow colour, It's possible?</p>
  
  <p>Thankyou for read</p>
  
  <p><img src="https://i.stack.imgur.com/kWmQP.jpg" alt="enter image description here"></p>