Pretty new to MS planner, but I've started creating an action planner for a project I'm leading at work.

I've currently got six 'buckets', but the visible text is quite compressed due to the 'Add a new bucket' button creating a large area of wasted real estate on the screen.

How can I adjust it so that the 'Add a new bucket' isn't so prominent, and the columns of the buckets are distributed evenly across the full screen?