I have a .jpeg that was created in Illustrator that I am importing into a sketch.

Hi Kevin, JPEG's don't support alpha channels so even if you created the graphic in illustrator with a transparent background it's going to come in white.

JPEG's also a lossy compression which produces image artifcats.

Instead of JPEG, export your graphics to PNG and enable background transparency.

When inserting the image into your sketch set the transparency to 'From file"

If John's solution will no work try this way:

1. Firstly choose "User defined" and pick background of the file:

2. Use "Transparency" and "Matching tolerance" to 'transparent' your file.

PS. I use simple graphic drawn in Ms Paint

Best regards

Alek