Limiting the dates that print in Smartsheet

edited 12/09/19 in Smartsheet Basics

I want to create a Smartsheet project that has a Start Date of July 1, 2019 and End Date of September 1, 2020. I want to set the timeline to Years/months. When I view or print it, I only want to see the months associated with 2019 and 2020 and I don't want to see any months in 2021. How do I do this? I can't hide the columns in the date section because they are locked. 

Thank you,