who do I configure Parallels to open on the same desktop as the mac programs

I have been using Parallels for 4 years and all of a sudden my desktop now switches between the mac and windows rather than showing both on the same desktop. What or how did I reset this. I don't seem to be able to ask 'help' the correct question to get an answer. All the answers I find talk about sharing. I have everything set to share. (Parallels 10.4, Mac OS 10.10.5, Windows 7 pro)
Example: I am in Windows and (I see my mac desktop in the background with the Windows window active). I also want to see my Mac Excel window text to the Windows window, but as soon as I select Excel, my desktop moves to the left and the Windows window disappears. then if I select the Paralles or Windows Icon, Excel moves off to the left and all I have is the PC window on my desktop. It must be a simple setting that changed with an update of windows that just happened - or something else simple.

 

Hi ArniL, Please try to set Windows view mode in Coherence or Window Mode and check how it goes.