Setting the option to allow/disallow history editing
If you are a user with an Administrator or Manager role, you can set an option to allow or disallow the ability to edit history items.
To set the option to allow/disallow history editing
From the Tools menu, click Preferences.
On the General tab, in the General preferences box, do one of the following:
To allow editing of history items, select Allow history editing.
To disallow editing of history items, clear Allow history editing.
Click Apply.