A pen invisible to guests

We would like to request the introduction of a pen that is invisible to guests.
When conducting lessons using Miro, it would be extremely convenient for teachers to have a way to hide content from students (such as thought processes, calculation steps, or verification checks). This would eliminate the hassle of switching back to physical paper and allowing everything to be completed within Miro. The frame hiding feature comes close to this functionality, but it also hides the content from the editor. We kindly request your consideration of this feature.