what's the best way to hide dock icons?

[Epiphron]

I don't want some applications to show their dock icon when they're running. Preview is an example. I've used the freeware app "Configure Dock Application Tile", but it always gives me an error saying I don't have permission. Is there another app that can do this?

 

[creator2456]

Dock Dodger - link

Have been using for a long time now and it does what it needs to do.

 

[Mal]

I've also used Dockless in the past, works great.

jW