changes made in the color page apply to the top clip only ?

I tried to play with the controls in the "color" page for the first time yesterday and found that only the clip at the top layer of the timeline was affected. I have tried to select the other clips at the lower layers in the "edit" page but the result was the same. May I know if it is possible to specify the clip to which the color changes is to be applied ? Thanks in advance.

Start here:

https://www.blackmagicdesign.com/produc ... e/training

OK, now I can see that the clip to edited in the color page can be selected by turning on the clip list window. Thanks.