- [Instructor] When drawing in an application
like Photoshop, you are adding pixels that have
particular color and light values.
These kinds of images are referred to
as bitmap or rasterized, which is the proper way to say
they're made of actual pixels.
If you want to edit images of this kind,
you need to edit the pixels.
There's another way though.
Vector graphics.
Vector graphics use shapes rather than individual pixels.
You can resize vector graphics as much as you like,
and they're automatically redrawn at the current resolution
of your image.
Let's look at an example, a circle.
Here I am in Photoshop, looking at a circle
I created with the shape tool.
The tool is set to draw pixels.
Using the selection tool, I can change
the size of the shape.
Look what happens when I do.
The edge of the circle becomes jagged
because, in reality, the circle is a set of square pixels
and I just made all of those square pixels larger.
Now look what happens when I draw a circle as a shape
which is a vector graphic.
Apart from the control handles looking a little different,
the circle appears to be identical until I resize it
with the selection tool.
As soon as I confirm the adjustment,
the circle is redrawn beautifully.
You can adjust vector graphics in this way
as often as you like.
They're not a perfect solution for the fine details
you'll see in photos, but vector graphics are great
for design work.