HP 54710A User's Reference Manual page 368

To create a polygon
1 Set the coordinate system in the Scale menu.
2 Select a new polygon number with the polygon softkey in the edit mask
menu.
3 Press the Edit polygon softkey.
4 Use the X and Y softkeys to position the cursor at the location on the
screen where you want to place point number 1.
5 Press the Insert softkey.
Pressing the Insert softkey inserts point number 1 of the polygon as
defined by the X and Y softkeys. You may also notice that the selected
polygon number appears on the display next to point number 1.
6 Use the X and Y softkeys to position the cursor to the location on the
screen where you want to place point number 2.
7 Press the Insert softkey.
The scope draws a line from point 1 to point 2, and the Point softkey
increments to the number 2.
Repeat steps 5 and 6 to add more points, up to 512. You can also use
the Delete softkey to remove a point or the Move softkey to change a
point's location. You may notice that after you define point number
three, the scope draws a dotted line between point number one and point
number three. The dotted line shows the last side of the polygon. As you
add more points to the polygon, the dotted line always connects to the last
point you insert. When you press the done softkey to exit the edit menu,
the dotted line turns into a solid line.
Mask Menu
Edit Mask
23–11