To save the changes you have made to the Stock Options Properties as defaults, right click the inside the Stock Options window. In the pop-up menu, click the Defaults option. Click the Save Option Chain Properties As Default option.
If you have saved any new settings for Stock Options, you can restore the default settings by right clicking in the Stock Options table and clicking on Defaults. Then click on Apply Default Properties to the Option Chain. The default values are applied.
To remove the Custom Defaults altogether, click the Remove Default Option Chain Properties. The original Market-Q Default settings will be restored.