If you work consist on constantly sharing drawings with your coworkers on paper, whiteboard or post-it, you can use free web services to replace the physical support with a virtual paper. These services enable you to share your drawings in real time between many people as well as enable other people to contribute to your drawing. There are many options and below you will find one example.
Jamboard by Google
Below a video with short tutorial.
Link to the service https://jamboard.google.com/
With this service you need your google account. If you have Google Account (enter you login and password), otherwise create your Google Account . Link below. https://accounts.google.com/SignUp