Using Transparency in Illustrator
In Illustrator, the opacity of any type of object can be changed at any
This is done by using the Transparency panel.
Blend Modes can also be applied via the Transparency Palette.
Blending modes let you vary the ways that colours of objects blend
with the colours of objects below them in the stacking order.
When working with blend modes, remember these tips:
The blend colour is the original colour of the selected object.
The base colour is the underlying colour in the artwork.
The resulting colour is the colour resulting from the blend.
The Knockout Group option on the Transparency palette controls
whether or not objects nested in a group or layer will show through
each other where they overlap.
It affects objects within the currently targeted group or layer.
When working with Transparent objects, you may wish to display the
Edit the grid by choosing File > Document Setup, Transparency.
Turn the Grid on by choosing View > Show Transparency Grid.
An object that controls the opacity of the objects it masks.
To create an Opacity Mask, place the object you wish to be masked
directly under an object you wish to use as the mask, select them
both and choose “Make Opacity Mask” from the Transparency panel.