When the project is printed, there is a big gap between the table above and the legend below. How can this be removed?

In the "Page Setup" of "Print Preview", the "Zoom" item in the "Page" tab is set to 1 page width and 1 page height.

Of course, if you have fewer task items, it is not easy to remove the blanks below how to adjust

The operation is as follows (the tasks in the following figure are too few, and the blank ones cannot be removed):