Thanks for posting. We are not 100% of the issue you are referring to, is this issue apparent when moving between Windows 7 and 8 or are they the same operating system? Often text size issues are caused by the text display settings within Windows itself, if they are set to anything more than 100% then this can be the cause.
If this is not the case would you be able to supply a screenshot of the issue?
Are you speaking of the text being actually too big for the text field?
I have experienced this opening “old” flipcharts on computers that are using Windows 8. It was solved for our campus by right clicking on the ActivInspire icon; selecting the “Compatibility” tab; in the “Settings” area check the box beside “Disable display scaling on high DPI settings.”
You would need to make this change on each pc that you use.