how to make a placement "whitelist"?

[Inaal Haolam]

1. How can I maintain a "positive" campaign criterion of mobile placemnets?

I need to enable only handful of particular placements.

Until now I just added a negative placemnet criterion for unwanted placements (via "negative campaign criterion), a.k.a. blacklist.

2. Is it necessary to declare the campaign plamcenents as whitelist somehow?

3. Can you point me to the steps or what are the keywords i'm looking for?

Thank you

[Inaal Haolam]

to be more precise:

4. can I define a campaign that it works in "include" mode (i.e. even if it doesn't contain any "include" placements) ?

[Ray Tsang (AdWords API Team)]

Inaal,

To make sure I'm aligned on the same page - in the UI, could I trouble you to let me know where you would've performed such function? (Please screenshot, etc in private).

Thanks!

Ray

[Berry Tsakala]

there's no such action in the GUI, AFAIK.

I thought there might be.

I decided to solve my issue by leaving a new campaign disabled until i have a first included placement, and only then enable it, so that it will not run on all possible placements (which is undesired for me for some campaigns). 

Thank you.