I have seen everyone facing this problem not been able to minimize your citrix desktop to access your local desktop. Since, i myself ran into this problem so google a lot but didn’t found any solution for how to minimize citrix 4.3.100 running on windows 10 that is current version of the citrix.
So, i started pressing random buttons on the keyboard to find a shortcut. So, after pressing couple of shortcut i found out Press > Shift Key + F1
or Press > Shift Key + CTRL + FN + F2 to get into tab/window view then re-size the citrix according to the size you want and work side by side with your local computer.
As the solution to the problem.
Citrix 4.3.100 (Current version of Citrix)
how to minimize and maximise citrix reciever current version 18.104.22.168 windows 8 and windows 10