Changing Size of Planning Table 
To display more information in the charts you can expand the whole planning table window - to the size of the whole screen. To do this use the functions valid for your operating system or for the graphical interface (GUI) you use (for example, with Windows the maximization symbol at the top right in the window).
The number of lines displayed in the charts also depends on the height of the graphical elements as well as on the font size in the chart section. You make the relevant settings in Customizing.