Hide all chart pieces except the charted line

Is there a way to hide the “y-value” lines and other border lines in the chart space so all the user would see is the charted line? Imagine a chart with nothing showing except the charted line.

On the axis of the pen, make it look like this:

I am using version 7.7.4 and the “Chart” component. Even though I seem to have it set to not show any y-axis lines, I still see them on the resulting chart. This is the dialog box I see for Y axis configuration:

Can you use a sparkline chart? That sounds like what you’re looking for.