AFAIK, the tool path display only displays tool paths, not work pieces. You could write some G-code to draw the lines that you want though to fake it out.
e.g. I think this would do it:
G01 X2.45 F100
Y0.5
X0
Y0
M30
Beware that this is very quick and dirty code with no safety block and no Z movement. It would not cut the part you describe as it doesn't have any tool diameter compensation.