Necessary to click when dragging on trackpad?

[air23cary]

On my MBA, I can double tap an icon, then drag it without having to "click" on the trackpad. Now using an external trackpad for first time with my mini, I cannot drag anything unless I click the trackpad. Am I missing something here?

 

[NewAnger]

I have mine set to three finger dragging. I never have to click the trackpad at all.

 

[air23cary]

there are certain times i need to click to drag or click to select an icon. never happens on my MBA. what's going on?