The problem happens in about 1 in 20 sessions. I use 2 devices, one with a digital pen for writing and the other for displaying.

There is also another problem with annotation that I reported long ago and it was never fixed. It is very annoying for tutors who use annotation extensively to teach students. Please tell your developer to test the software fully on various platforms and fix this bug. On iPad, it happens in 7 out of 10 sessions. It rarely happens on Windows (about 1 out of 20 sessions). The way to work around it is when it happens, leave the meeting and rejoin again. I keep using iPad but now my students with iPad have this problem most of the time. Similarly, Chromebook annotation is horrible so I gave up on it too. I gave up annotation on Android long ago because of this problem. When the Internet is really fast, it happens so quickly that the annotator won’t see the disappearance and reappearance. The reason why it disappears and reappears in a fraction of a second later is because of the slow traffic on the Internet. At this point, the original device erases what is on its screen (for the object) and redraws it. But a copy is also sent back to the original device. It is also sent to the ZOOM server to be displayed on other connected devices.

The way I understand it is that when the annotator draws something, it is immediately displayed on the device. This always happened on Android, often on Chromebook, occasionally on iPad, and rarely on Windows. What I mean is you draw a dot at location x, it will disappear and then reappear at location x + 5 instead (or a bit further). It is about you drawing at one spot and then the thing is cleared and appears a bit away from it. There is a bug in ZOOM annotation that has been around for years. Here are my latest communications with support: It is also not perfect on Windows where it is most stable. Yet, this module is buggy and unreliable across the various platforms that my students use. I have had troubles with annotation for the last 3 years and tech support could not do a thing apart from telling me to uninstall and reinstall to waste my time.Īs I teach students using very detailed annotation, the annotation module is so important for teaching.

Zoom annotation tools