Key combination not propagating to Fusion VM
The key combination ctrlcmdD is a system wide shortcut to show or hide the definition of a selected word/words. This even works in VMware. As a last resort the definition of the name of your virtual machine will be shown.

To disable the shortcut, open Terminal and enter:

defaults write com.apple.symbolichotkeys AppleSymbolicHotKeys -dict-add 70 '&lt;dict&gt;&lt;key&gt;enabled&lt;/key&gt;&lt;false/&gt;&lt;/dict&gt;'


This will add the key 70 to the file com.apple.symbolichotkeys.plist and disable the shortcut. After a reboot you will be able to use the above shortcut in fullscreen mode in Windows 10.

You may get a similar result by installing Karabiner and adding a special keycode.