Currently, System Fields is only visible in the Translation Memories view. However, especially when working in the Editor with multiple TMs, being able to see the System Fields is extremely helpful. It enables you to see when the TM was created and by whom, when it was last used and by whom, who added the particular translation that comes up in the concordance and when. SDLX used to offer this option (then called Translation Attributes) and it was incredibly useful, I used to refer to it all the time. Please add a System Fields box to Editor.