Representation of the "grid" section in the screen :
- Character : no graph associated with the grid
- Grid or graph : graph and grid are alternatively present at the request of the user
- Grid or graph : graph and grid are present in the screen
- Graph: only the graph is present on the screen ; the grid is not accessible
For the last 3 values, a screen for the "Graphical parameters" is accessible from the contextual menu.