Hello @sonia1 Welcome to the Canvas Community. Thank you for posting your question here. I do not really have an answer for you, but I did do some searching and came up with a few links that may be of help. These first two links are in the Cold Storage area here in the Community, so you may need to request access to Cold Storage in order to view them:
Please let us know if you have any other questions about this...or if you find that you want to contribute to one of those other discussions that I've linked to, that's perfectly fine as well.
Hello once again, @sonia1 ...
I wanted to check in with you because we have not heard back from you since you first posted your question on July 16, 2018. Have you had an opportunity to review the feedback that I provided later that evening? If so, did it help to answer your question? Do you have any outstanding questions related to your original question? If you feel that my above feedback has helped to answer your question, please feel free to mark the above response as "Correct". However, if you're still looking for some help, please come back to this topic and post a message below letting us know how we can help. For the time being, I am going to mark your question as "Assumed Answered" because we've not heard back from you for about five months and because there hasn't been any new activity in this topic for that same amount of time. However, that won't prevent you or others from posting additional questions and/or comments below that are related to your topic. I hope that's alright with you, Sonia. Looking forward to hearing back from you soon.