title: Can you change your learning rate while training in Tensorflow Object Detection API
body: <p>I understand that it's probably better to lower your learning rate when it is converging.</p>
  
  <p>My confusion is, can you just change the value in the config file after certain steps?
  If yes, which config file should I change? The one generated in train folder or the one in the downloaded model folder?</p>
  
  <p>Do I need to export to frozen graph first for the changes to take effect?</p>
  
  <p>Thank you in advance for helping me!</p>