select this option, please make sure you selected the right
preset to edit.
Fast is "owner" of two names: Default and Last used
settings. You're not allowed to "edit" those settings,
must select any of the presets you saved.
you can do any corrections and modifications for the selected
preset, even changing it's name.
Apply button to save the changes, Close button to discard/exit.
may use the default mode, Edit with current settings. This
mode allows to edit the current preset with the parameters
you're using. If you want to edit the real saved preset, use
the Edit with real preset settings.