Sorry, no. The only way is to hold the Shift key. Make sure you are not on the edge of the block when you let go of shift too as you might fall over! It has happened to me a couple of times (from great heights at that! lol)
if you set it to CAPS LOCK as the sneak button, you only have to press it once to turn it on then press it again to turn it off. --- i like pie. number of other users that like pie: 39. CVagts posted in one of my topics.