can modify the look of the graph many ways.
You can change the thickness
and colours of the curves.
You can put comments
on the graph.
You can rid of the tooltips.
You can undo the changes by clicking Restore
If there is a particular way of doing graphs
you prefer, you can set that up as a Profile
and use it whenever you want.
You can change the way CalGraph looks too, with the graph
taking the whole window, or splitting the
window into two parts, the buttons and the graph.
Once the graph is the way you like it, you can print
it or cut and paste it into another