How to Search by "All" Countries

When searching for a member, can anyone tell me how to do it for ALL countries? There is no ALL in the country prompt.

I mean I am looking for someone, I have no idea which country they are in, so how do I search for them?

Any ideas. I am sure you have all run into this problem

In admin panel go to predefined values and then select countries.Add new one by clicking green button on bottom.Leave every fields as blank.But the problem is that cannot name it.If you want to select it as default,then go to advanced settings-->Index page settings-->and leave default country as blank.

 Cannot add a "blank" value to the Predefined Country. This is so silly. How can you search for someone if you have no clue which country they are in? Darn silly.

The one way for me is to remove the country prompt from the search option, until it is resolved.

Leaving the country blank in the page builder (search block), does nothing.

This may be silly,but by using this can search all countries.Blank =All countries.If set it as default,the user can search without selecting a country and result will shows all countries.

 No, I don't mean your solution. What you are saying is correct, it is the way Dolphin is setup that is incorrect.

What you are suggesting I cannot do, the system will not allow me to do it.

Another solution?

Bump. Help anyone?