To add to Joris' replies,
I like to get the performers logo on top layer without it being interrupted by effects on other layers. thanks!
Unless you put the effects at the composition level, you should have no problems having logos on the top layer.
Now, if you are intent on putting the effects on the whole composition, here is another way you could address your needs:
layer 5: Performer Logo
layer 4: Layer router of composition with effects
layer 1-3: clips for composition (pics & vids)
That way the layer router will apply your effects to the composition below and the logos will be unaffected by your choices below. Also, if you want to turn off all the effects for the comp, all you have to do is blind the layer with the layer router. To make it even easier, you could use the keyboard map and use B to blind the layer router.
Note that this will work with most but not all of the effects and you might need to turn on the [Black BG] option as necessary but the beauty with this technique is that you can have different layer routers in each column with different effects so even though it would affect the whole composition, you still retain creative flexibility.
You could do the same to disable effects on layers by applying the effects to the various layer routers that target individual layers. Take a look at my sample file in this post
viewtopic.php? f=5&t=11287. Then once again you could use the keyboard map and assign keys to blind the varous layer routers.
Note that if you use the effects on the individual layers, you'll be able to use any effect since there is a blackout between the sources and targets.