Using the Concept Builder
The Particles .. Moles .. Mass Concept Builder is shown in the iFrame below. There is a small hot spot in the top-left corner. Clicking/tapping the hot spot opens the Concept Builder in full-screen mode. Use the Escape key on a keyboard (or comparable method) to exit from full-screen mode.
There is a second hot-spot in the lower-right corner of the iFrame. Dragging this hot-spot allows you to change the size of iFrame to whatever dimensions you prefer.
Using the Concept Builder
This Concept Builder will open in a separate browser window on your device. Click the Launch Tool button to open the Concept Builder. Close the window to return to this page.