File opened in extended screen mode and saved in that mode

Our users usually have two screens when they are working. There are times they will extend their excel window across the two screens when they need to refer to more than 1 reports at the same time.

Sometimes one of the reports is put on the extended part of the window and accidentaly SAVED in that state. When that happen, if they are in a meeting where they are presenting (like two screens but not actual fact), that report will not appear in their main screen because it is opened "hidden" in the extended area that cannot be seen.

It has caused quite a lot of embarrassing moments and confusion of whether the file is available or not for some of our users in important meetings.

Is there any trick to dealing with this issue?