How can I get very compact printouts?

You will need to experiment, but here are some things to consider.
However they may all affect the readability and accessibility of the printout (especially for your older readers!).

A.  On the Advanced Printing Options Screen (see Section J8)

1.  At 'Teacher Style' or at 'Line/Position', select Teacher initials (not full name).

2.  At 'Max Lengths', select the shortest reasonable lengths.
     eg. Subject = 2  so that 'Maths' becomes 'Ma'.
     Also, in Basic Data, use short 'Class Printing Names' if you have long 'Class Scheduling Names'.

3.  At 'Spacing', reducing the 'Gap size' may help.

4.  Consider 'Portrait' or 'Landscape' format ...the best one depends on the number of periods in your school day.

5.  In conjunction with the paper format, consider the best arrangement of the items within the cell.
      For a Staff Timetable, the best arrangement is often: 
      rs       or       c         but see the examples in Section J13. 
      c                  rs

      For a Class Timetable, the best arrangement is often: 
      T        or       sr        but see the examples in Section J15. 
      sr                  T

B.  On the Print Setup Screen (see Section J5)

6.  At 'Font', select a thin font, like 'Arial Narrow', and also consider a smaller font size.

7.  At 'Sizing', select the smallest reasonable values for 'Teacher/Class/Room width' and for 'Column width', and then adjust the 'per page' to fill the page.  Consider revisiting item A4 above to look at 'Portrait/Landscape' again.

You may need to go through all these items more than once to get a good Printout which is both compact and readable.