Display/NoDisplay reference curves of inactive sketch:

I know about two places to set default Display/NoDisplay reference curves of inactive sketch:

• Preferences → Sketch → Sketch Settings → Inactive Sketch → Display Reference Curves
• Customer Defaults → Sketch → Sketch Style → Inactive Sketch → Display Reference Curves

But for a sketch created with "Display Reference Curves" unchecked, how can I display reference curves in it?

It seems that Show All doesn't work.  Is it possible?

Thanks!