To modify the pieces of a graph, we use the Chart Elements button on the graph. If we want to change how the data series appears inside of the graph, we need to format the data series.
To get started, let’s assume we have a graph like the one below.
This graph actually has two data series, one in blue and the other in orange. Suppose we want to change the orange data points to a line that connects the points. Start by right clicking one one of the orange data points.
To change how the markers appear, select Marker from the Format Data Series panel. If we expand Marker Options, we can see exactly how the points are being formatted. You can choose Built-In to change the type, size and color of the marker.
I want the markers to disappear so only the line appears, so select None.
Now the points no longer appear leaving only the purple line for the data series.
Try experimenting with the Format Data Series panel to see what you can change on the data series.