I will do my best to answer this without having my computer with BLS-2016 handy. That option should be in the same place, or at least nearly so, as that in BLS-2015, if you used it that season.
On the Lane Assignments screen where you set a particular week as being Normal, Position Round, Playoff, etc. there is a column for the points to be awarded (there may be a column heading about Points, but I do not know that for sure). Without having that in front of me, I can't say precisely which column it is, just that it will be generally to the left side of the window. The option is a pop-up menu, which allows for Normal Points, Zero Points, and even Double Points.
Clicking on the various columns in that row will produce various pop-ups, and given this I am confident that you will be able to determine the precise location/column on your own based on my prompts. To narrow it down further, it won't be the date or week number fields, nor the column for Type of Week (beginning of my previous paragraph).
Always check, download, and install the most recent update of your software to ensure that issues may have been corrected.