set a marker in advanced tripod or advanced free mode at 75mm, and then another immediately after at 24mm, then move along a little bit and the lense will automatically zoom back to 10mm, where you can set a 10mm marker and then delete the previous 2, and there you have it!
a lot of people prefer a slightly higher mm like 15 or so, to do that just set the 24 and 75mm markers a little spaced out from eachother so the zoom doesn't hit the 10mm mark too soon. that might not make sense in written form, but it'll make sense when you start dicking around with it