You can switch to question management from the settings menu or from the envelope image in the top bar. In the section, you can view which requests have questions asked by bidders.
Unanswered questions - list requests with unanswered questions
Answered questions - list requests that have answered questions
Answering questions
Select the request whose questions you want to process
The system moves to the "Questions" page for that request
Type the answer in the "answer" box
If you select "the answer can only be seen by the person asking" then the answer to the question goes only to the person asking the question
If no choice is made, the answer will go to all bidders who read the announcement