The graphic properties panel "Fill" and "Line" shows the current style applied to lines and filling. When an element is selected, its fill and line properties panel shows its current properties.
The current line and fill are displayed in the middle of the top panel.
By clicking on line or fill, the panel shows the fields to modify their parameters.
4 types of coloring are available both for line and filling:
"color", "gradient" or "pattern", "none".
These types of coloring can be assigned by clicking on the relative round buttons in the panel.
To the left of the fill and line representation, there is a button for swapping the line and fill properties.
To the right of the filling and line representation, there is a button for showing the "library panel" associated with the type of coloring. A library is available for each property: color, gradient, pattern.