If you are trying to adjust your Windows 10 Power Settings and find they are greyed out, there is a simple fix. Click the CHANGE SETTINGS THAT ARE CURRENTLY UNAVAILABLE link near the top of POWER OPTIONS > ADVANCED SETTINGS window.
How to fix Word / Outlook having ADD TO DICTIONARY Greyed Out
… and the answer is, because you are working the old 1997-2003 .DOC format. Save your file as a 2007/2010 .DOCX format and all will be well.