This option centrally enables/disables the dynamic spellcheck in the Job Editor.
'Check while typing' (Spelling) enabled by default
In the editor, the spell check will dynamically flag spelling errors by underlining them in red. This is the default behaviour in a job.
If, however, you want to change this and require that the user must manually enable this feature in every job, simply uncheck this box.
Enable/Disable in Job Editor
'Check while typing' can be enabled/disabled in the Job Editor in the 'Spelling' panel, as shown.
NOTE:
The word 'gears' is marked as a spelling error here, because the target language of this translation job is German.