Step 1: Open up Zmodeler, click on little arrow next to cone and select 'Dummy Helper'
Step 2: Then click on the on the box with colorful arrows.
Step 3: Then, a little blue pixel appear on your screen.
There you go, you created a dummy.
Follow the next steps to edit the dummy
Step 4: Right click on 'Dummy Helper' and click on 'Properties'
Step 5: Then click on the blue box with (0, 0, 119) Next it.
Step 6: Then select the green with this color code (0, 128, 0)
Step 7: Then modify Scale X, Y and Z to 0.05