Then hit ENTER to generate a rendering onto your screen:

To quit this rendered image, click it or swipe the tool away. Hit CTRL-E to save as a new file, e.g. "bottle1.a3d."
 

Adding a fillet (chamfert tool)
Hit 0 to view all; then hit 1 to zoom into the bottom area of the bottle. A rectangle appears around the cross cursor. Use it to center the zoom window at the bottom of the bottle (click around that area). The rectangle is positioned there and goes into trubber-band mode, so you can click a second time after setting its size. Amapi then zooms into that selected area.

You will want to have a good view as shown below of the bottle's bottom area.

 

We're now going to use the Lasso selection cursor to select a few edges of the bottle, i.e. the ones at the bottom, which is where we will want to apply chamfert (also known as bevel or fillet).