Shifting
The Qedit string window has an option to match strings even if they differ in case. If you want to match “speed demon”, “SPEED DEMON” or even “Speed Demon”, do:
/list "speed demon" (upshift)
If you want to change the case of letters in your text, use either Proc DOWN (downshift entire lines), Proc UP (upshift entire lines), ^W^S^D in Qzmodify (downshift from cursor to end of line), ^W^S^U in Qzmodify (upshift to end of line), or ^C in Qzmodify (reverse case of cursor).