draw lines of paint that you can specify their thickness from the option
bar of each tool.
Of course you can use the brush tool to create sharp and blurry lines,
and if you want to create hard edge strokes you can use the pencil tool
to do that.
While using the brush and pencil tool, you’ll notice that these tools
create continuous lines of color as long as you’re dragging, and the
flow of paint will stop immediately when you stop dragging on your
screen using the tools.
This tool is used
to make color corrections in your image, by applying corrective colors
over targeted colors in your image. This tool doesn’t work on all image
types. For example they don’t work on bitmap, indexed or multi channel
color modes. So this tool is used to correct and replace paint with
foreground color without painting the details of your image.
This tool creates a blend
between multiple colors, you can use gradients already created by Adobe
Photoshop or you can create your gradient by selecting the multiple
colors you want for the gradient.
The main use of the paint
bucket tool is that it fills any area you want with the foreground color
that you chose, it also fills pattern according to the brightness of the
image exactly the same way the magic wand makes selections.
The Eyedropper tool's job
is to sample colors from any part of the image to change the foreground
or the background color to the color the you desire to work with.
The Color Sampler Tool is
used to give you color information for one or more than one location in
the image, each sample will be saved as a reference .