Opening up the lane essentially means to be able to cross more boards of the lane. For a right-handed bowler it would be to roll the ball from left to right.
Just a few years ago I'd play in the dry boards almost all the way down the lane with my target at the first arrow (board 5) while standing right of center. Now I'm lining up quite a bit left of center rolling the ball over about board 20 and targeting the third arrow (board 15). I'd say I start with opening up the lane right from the beginning unless I find that there's a flood in the center and my ball doesn't make it back; however, there's always that friction from about board 10 out to get me back at least some.
Hope this helps...
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