After wasting more than an hour, I found this suggestion on some obscure web page. The *INSERT Key Toggle* for OSXMavericks>Parallels10>Windows7 app running on MacBook Pro Retina 2013... try FN + Return (also known as Enter) It worked just fine for me as a developer of tradestation automated strategies. Good luck. John PS: support staff at Parallels should be all over this silly question... and not make users have to scour the Internet burning up precious time. 8-/