Pin your patch or piece of other fabric to the middle and position it so that you can easily find it by feeling for it while you're wearing the wrap. (abckidsinc.com)
The arrow keys are offset towards the user, which makes them easier to find by feel in games, and a row of six macro keys lurk above the normal function row. (digitaltrends.com)
The volume buttons are a welcomed addition (the original Kindle Fire lacked this basic feature) though they are hard to find by feel. (pcworld.com)