|Define in which format you wanna have your projectplan.
The start date is 01.11.2016 and end date 09.01.2017 - and 00031 - Show Weekends has been enabled.
If you choose daily you end up in 70 columns, because every day (inkl. weekends) will be shown as one column.
If you choose weekly you end up in 11 columns, because every week will be shown as one column.
If you choose monthly you end up in 3 columns, because you will see November, December and January as columns.