Likely ”Allow Possess/Grab” is turned off for some or all of the controls. Some creators (including myself) often do that to prevent you (and themselves!!) from accidentally destroying the scene. It might ruin carefully created animation alignment, etc. If you want to make changes, you can just reenable the checkbox.
Atom Control “Isolate Edit This Atom” Opens an Isolated Atom Edit window with options for disabling other atoms in game to make it easier to edit the selected atom. "Name Space" in the corner of "Isolated Atom Edit" displays the name of your selected Atom “Freeze Physics: Freezes...
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