In addition to settings from the preference panel you can resize the main window, change the width of the playlists window and change the size of the fields in the tacks window.
On all operating systems you can change the window size by pressing and holding the left mouse button on the lower right corner of the window and dragging the corner to enlarge or shrink the window. On Linux and Microsoft Windows you can do the same at any place on the border of the window.
To change the size of the playlist window press and hold the left mouse button at the boundary between the playlist window and the tracks window and drag the boundary to where you want it.
To change the size of a field in the tracks window press and hold the left mouse button on the boundary between the labels for two track columns and drag the boundary where you want it.