[SOLVED] Unable to turn off some keyboard shortcuts

In Mageia 3 using KDE I succesfully use the JEdit programmers editor. A number of the shortcuts I have setup under JEdit seem to be used by Mageia somewhere at the OS or KDE level. I try to find where they are used by Mageia as shortcuts so that I can turn them off in Mageia in order to use them in JEdit. But I have not been able to do so in all cases.
As an example the combination Ctrl-F7 is used by me in JEdit for certain functionality ( in my case it is to duplicate lines ). Therefore I want to remove its shortcut association in Mageia/KDE. If I open the System Settings and choose Shortcuts and Gestures I see Custom Shortcuts, Standard Keyboard Shortcuts, and Global Keyboard Shortcuts, But nowhere in any of these shortcuts do I see Ctrl-F7 described so I can eliminate it as a shortcut. But clearly it is used by something in my Mageia/KDE setup. I know this by the fact that not only does it not work under JEdit but if I try to type it in under the JEdit dialog that lets me setup a JEdit shortcut, the dialog itself moves to outside the JEdit main window and the key combination never gets entered in the dialog. So clearly Ctrl-F7 has something like the Mageia/KDE functionality of moving a window to some place outside of its parent window. Whatever its Mageia/KDE functionality for Ctrl-F7 I want to disable it so I can use it in JEdit for my normal purposes.
Ctrl-F7 is just one example of a key combination I use in JEdit which I cannot seem to disable at the Mageia/KDE level. My general question is therefore: Where to I find keyboard shortcuts outside of the ones in the Shortcuts and Gestures areas of the System Settings so I can disable he ones I want ?
As an example the combination Ctrl-F7 is used by me in JEdit for certain functionality ( in my case it is to duplicate lines ). Therefore I want to remove its shortcut association in Mageia/KDE. If I open the System Settings and choose Shortcuts and Gestures I see Custom Shortcuts, Standard Keyboard Shortcuts, and Global Keyboard Shortcuts, But nowhere in any of these shortcuts do I see Ctrl-F7 described so I can eliminate it as a shortcut. But clearly it is used by something in my Mageia/KDE setup. I know this by the fact that not only does it not work under JEdit but if I try to type it in under the JEdit dialog that lets me setup a JEdit shortcut, the dialog itself moves to outside the JEdit main window and the key combination never gets entered in the dialog. So clearly Ctrl-F7 has something like the Mageia/KDE functionality of moving a window to some place outside of its parent window. Whatever its Mageia/KDE functionality for Ctrl-F7 I want to disable it so I can use it in JEdit for my normal purposes.
Ctrl-F7 is just one example of a key combination I use in JEdit which I cannot seem to disable at the Mageia/KDE level. My general question is therefore: Where to I find keyboard shortcuts outside of the ones in the Shortcuts and Gestures areas of the System Settings so I can disable he ones I want ?