You have Custom setting for Portfolio for setting Single Portfolio and Portfolio Archive
If you want a different settings for a page, then you can setup options in Custom setting for Portfolio and apply it to that specific page It will overwrite settings in Theme Options Any option is set to Default which is the current style of your Theme Option. So, if you want same settings on all pages, then you don't need to select anything. If you want a different option for Single Portfolio page or Portfolio Archive page, then you can choose any other option here as your wish.
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