Text jumping to huge font and asking me to open with Microsoft Word

Thanks for the additional information and if you notice this happen again in the future, please let us know and send us a screenshot so that we can have a vsual too willstpher 

Jay, Strangely, I  cannot now duplicate the problem I was having but it seems to have something to do with the space bar that triggers jumping out of the editing I am doing and produces a half screen of greatly enlarged fonts and a button requiring  me to OPEN IN and then a button MICROSOFT. This happens repeatedly. Also a bright blue line appears at the top and bottom of the screen. In general attempts to edit are frustratingly delayed.

Hi willstpher, thanks for bringing this to our attention.

Could you attach a screenshot showing what you're describing?

Is this on the Dropbox site or mobile app?

This will help me to assist further!