Question: Combine lines in to a plot structure

I'm trying to plot several plottools:-line


The only issue is that when I use a mouse to select the lines in the plot only one line segment is plotted. There seems to be no line sequence. How do I group all the lines in to one line structure so the mouse will select them all? [This is because when one selects a line with the mouse in the plot maple highlights it and this can make it easier to follow from other paths]

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