Ther are a couple of existing tools than can help here:bawe wrote: 1). the main window cannot be resized vertically (i.e. zoomed in and out vertically, not just horizontally) so that more tracks can be seen at once (essential for large projects which have a large number of tracks)
1) View > Fit Vertically or its keyboard shortcut Ctrl+Shift+F (chosen this way to mirror the Ctrl+F for zoom to fit horizontally.
2) View > Collapse All Tracks or its keyboard shortcut Ctrl+Shift+C of you have a lot of tracks they still not all fit though, but you will see more tracks.
See this page in the manual: http://manual.audacityteam.org/o/man/view_menu.html
WC