- [Instructor] Nuke's Viewer is incredibly powerful
and obviously an essential tool
for viewing your visual effects.
In this video, we'll survey the viewer's
awesome capabilities.
But let's start with the viewer node itself.
Now the viewer node can be connected to any nod in your tree
so if I hook it up here, I'm going to
see the read node for the jet.
Over here, is the read node for the background.
And of course down there is my composite at the merge node.
Now the viewer can have up to ten inputs.
And we can do that by the numbers.
See this little number one right here?
Okay, so I can select this read node and type a one.
Then select this read node and type a two.
And then this one and type a three.
So I now have three completely
different inputs numbered one, two, three.
I can then rapidly cycle through those inputs
as fast I can type on the keyboard.
One, two, three, one, two, three.
This is very useful for toggling back and forth
between a couple of different images.
If you happen to accidentally lose your viewer node
it's real easy to bring it back.
You can either type a command I on the keyboard
and get a brand new viewer node, dink.
Or a new feature is you can select a node
and type the number one and it will
hook the viewer node up to the first input right there.
Okay a couple of ways to get your viewer node back.
Alright, let's take a look at the actual viewer navigation.
How do we navigate here in our viewer?
Let me push in a little bit, okay.
First of all, to pan.
Alt, left mouse button and drag.
Very nice.
To zoom, alt middle mouse button
and then drag left and right.
Okay, you can also zoom with the thumb wheel.
Now the interesting thing about the thumb wheel is
if I click on a spot with my cursor, click
now when I thumb wheel it will zoom in
on that location right there.
You can also do an integer zoom with
the plus and minus keys on the keyboard.
So on the keyboard plus, plus, plus.
Minus, minus, minus.
I'll re-home the viewer.
Now when you're doing these zooms,
here I'll go plus, plus.
You'll notice up here, looking up in this area here.
Move my viewer wider 'cause as you
collapse the viewer you lose some of those icons up there.
So let's widen this up, 'cause I want to
show you this guy right here.
This window here reports your current zoom level.
So by using the plus key, watch that number, plus plus.
See, 300 minus key, 200%, 100%.
If I got minus, 50%, 33%.
You can also do the pop up and do it by the numbers here.
Or, and more helpfully use the quick keys here.
So the command key, zooms in and the alt key zooms out.
So command two will give me 200%.
Alt2 will give me 50%, like that.
Now I've been homing the viewer for you here.
And there are actually two keys or doing that.
And you will want to remember these two keys.
First of all is the H key.
That means to home the viewer, center it in the screen.
But watch this, as I change the viewer size
you see it's constantly fitting itself
to whatever size the window is
and it's doing a floating point zoom.
These numbers right here are floating point.
The other key is the F key.
The F key will also center and zoom the viewer.
But if I move the viewer size now,
it's going to jump in integer sizes like that.
You see that?
Okay that is because sometimes you
want your zoom to be an integer based zoom.
Exactly 200% or exactly 100%.
Other times you don't care, so you got
two different keys for each situation.
Okay, let's take a look I'm going to
do the H key to home the viewer.
So we can take a look at some of the action down here
on this window below the viewer.
That window holds information about the image
on the left side over here is size information.
And over here on the right is color information.
Okay, let's take a look at the top row
of controls up here above the viewer.
Starting at the left, these have to do
with your layers and channels.
We'll look at this later with movies
that are dedicated to just that subject.
'Kay next and this is very important.
This is where you do your color channels.
So if I want to see the red channel
in the viewer, I do that.
Or I want to see the alpha channel
of whatever is in the viewer.
But each of these has a hot key,
you can see right here, hot keys.
So, I'll go back to RGB, so with the cursor
in the viewer, and it has to be in the viewer.
Because those keys mean something different.
If the cursor is down here in the node graph.
So cursor in the viewer, I type A to see the alpha channel.
To go back to RGB, the rule is
hit the same key a second time.
So I'll hit A again.
Now let's say I'm looking at the red channel
and then I hit G to look at the green channel
to go back to RGB I have to hit the last key
a second time, which will be G.
Takes me back to RGB.
This next guy here is the viewer lut.
Which we'll be looking later in a separate video.
Now up here are the viewer wipe controls
which we will also be looking
at later in a separate video.
In the next video, we'll see what happens
to these icons when we adjust the GUI.