When using the Editor to edit a script such as a Class or Namespace you can specify whether, when you Fix the script and Exit the Editor, just the functions in the script are re-fixed, or whether the whole script is re-executed, thereby re-initialising any Fields or variables defined within.
These two actions always appear in the Editor File menu, but you can specify which is associated with the <EP> (Esc) key by selecting the appropriate option in the drop-downs labelled:
In both cases, you may select either Only Functions or Everything.
The label for the corresponding items on the Editor File menu (see UI Guide: Editor (The File Menu, editing a script)) will change according to which behaviour applies. Note that if you specify a keystroke for <S1> in the Keyboard Shortcuts tab, this will be associated with the unselected action.
See also If not ....