Most of the time when you're working on motion graphic or even videos in fact it's more useful in videos.
You really don't want to start previewing from the beginning.
You want just to limit to a certain time that you are working with for this aftereffects give you these
options fresher for this great bar here.
It's called the work area.
You have work area start and you have work area and and this determines the work area and you have to
be very careful also when you render about the work area we'll go through that.
I can start the work area for example at one second and end it at three to a second.
Now I want to play only what's inside.
And this is how I did the set up here to show you previews.
It's time to show you how I did it.
I will open the preview panel.
Stretch it down to the maximum.
So first of all in the preview here you have go to the first frame go to the last frame of the whole
camp.
But since you have done this work aerialist put it here.
You also have go previews frame I will click on it and you see it's moving frame by frame.
Or you can use a page up to use frame by frame and then pressing page up and to go to the next frame
you will press a page down.
OK.
This is very useful mainly when you're doing rotoscoping or you're doing a lot of other things you have
seen these things I think OK that's one then the shortcut the shortcut instead of coming to click.
Please stop here.
You can just play us spacebar and start playing.
That's very nice.
I never use this space but I just like to come here.
Actually I don't like reaching for the keyboard.
Now here you have the option cash before play back.
Now this option is coming from the previous version of after effects we use to cash.
So it will play the animation and cash it all in the memory then play it back and we can preview it.
But now the system has changed a bit where you you know play cache and preview at the same time.
So it's up to you if you want to go back to the old system.
Well first of all you cash it.
Meaning you put in memory the whole animation or only in your work area and then play it or you can
just do like I've been doing since the beginning of the course without this option.
I like it very much without this option because I can see the playbox and I don't have to preview them
and it's very useful when you're using a computer that has only 40 gigabyte memory or it now play from
and that is now very nice.
It's about start of range or current time.
Now I have always said that the current time current time means I start from where the time line indicator
is if I play if I press play.
You this it will start from here and go to the beginning.
Let's make it longer for you to notice.
I'll come for two seconds and if I say play with the current time you know this it will start from here
and then it's playing only the work area.
So you're not at the range.
Also I did it.
It's only the work area that is played.
It will play from work area start to work area and only and that's very useful if you have a movie or
even this animation.
So you can just focus on this portion of your composition and really work on it.
When Also when the mouse pointer is like double arrows you can click on it and move your work area with
the same number of seconds.
For example this is two seconds.
Now I can click on it and just move it.
And then when I press play now it's going to start playing from this work area of course it's empty
let's put it here and I'll take it to the beginning and address this very fine.
Now let's click here to start my work area from here.
I know I have to come to this point and drag it in.
What I can do is to press B and then this is the beginning of the work area.
Now I want the work area to end here.
I will place and now these are the shortcut B.
And also you can come and now play of course.
Move it the way you want.
Like we said.
OK.
And it's startling because you have work area here.
It's starting from the work area or you can say you know they have so many options here.
Work Area extended by current time.
For example if I put it here it will start playing workarea work area by extended time.
And here you are start from here and it will stop at the end of the work area.
So and also you have an entire duration that is the entire duration of the composition.
So it starts from the time line indicator.
So and also you have other options.
Play around in time and so on.
You know like you are playing here you say OK I want to play only two seconds around the current time.
Not useful at all unless you get movies and you don't have memory.
So let's put on the work area and this is how you get to work to return the work area to it's normal.
You know the full camp is just come to the work area and DoubleClick.
This is about the work area and the current time.
Now the frame rate here the frame rate always leave it to auto.
In my case it's showing 25 in between brackets meaning that this composition is 25 frames per second.
And I put the frame rate to automatic.
I can really change it to 24.
Now notice the brackets had disappeared.
So you know you said this value and is not the default value.
So the best is it to auto.
Otherwise you know how you land.
Now the interesting thing is the full screen for screen is a bit annoying but from time to time you
will want to use it.
For example I think the full screen and I come I play need to switch to full screen.
Of course now the resolution that I'm using is a bit odd.
So a part of the view of the composition is KOLOFF because I'm recording now to go back to normal you
just click and it goes back not just how you saw this white ones here.
It's a memory issue.
So using the work area and the preview you can actually you know make your work a bit easier and really
preview only the slice or the portion of time that you want to view.
So please use these options and I would see in the next election.