The available font and type can be selected here.
The font size can be adjusted.
Number of decimals
You can adjust the number of decimals a value has when displayed inside the chart.
X-Axis and Y-Axis
This opens the sub-navigation of the Axis settings.
Data Set open
This opens a table where you can edit the data source for the chart.
The line chart line widht can be changed by using the line width setting in the chart settings.
The Pie Chart hole size can be changed can be changed by using the Hole Radius setting in the chart settings.