Learn to create an interesting background in Illustrator. In this Illustrator tutorial, we'll explore various techniques to make your background visually appealing and interesting. You'll learn how to use various tools and features in Illustrator to create stunning backgrounds that complement your artwork.
Make a web document. Draw a rectangle with no strokes and just a fill.
Make a new gradient. I opened the Flowers swatches to pick the colours.
Drag the new gradient to the Swatches palette. Apply it on the rectangle.
Choose the Knife tool.
Create some cuts in the rectangle.
Choose everything and apply a 30-pixel feather.
Choose the bottom objects and apply the Tight Scribble Options.
Now you have a nice background for a PowerPoint presentation or any other use.