There are two main types
of gradients in Adobe Illustrator, Linear
and radial as seen below. Default versions
of these can be found in the swatches panel.
To select
the gradient type, highlight the object you
want to apply the gradient fill to with the
'selection tool'
then in the gradient panel select the desired
fill from the dropdown menu as seen below.
You can
also alter the colours used in a gradient
fill by clicking on the small coloured tabs,
then choosing a new colour from the colours
panel by sliding the CYMK bars up and down.
You can
add several colours to a gradient, by simply
clicking the blank area in between where the
coloured squares are at the bottom of the
gradient panel (fig1). To delete the colours
click on them with the mouse and drag them
out of the gradient panel.
Gradients
can also be rotated to fit your design, select
the object containing the gradient and then
in the gradients panel enter a number in the
'angle' number box, as you can see above I
have used 90.