How optimize the shape of the molecule?

Good morning, I’ve been using Avogadro recently. I would like to know how I can do to optimize the shape of the molecule after creating atoms and bonds.
Please see the following link http://www.ilcrocicchio.it/notizie/ambiente/229-prova1.html for H2SO4.

There are two general ways:

  1. The auto-optimize tool (interactive)
    https://avogadro.cc/docs/tools/auto-optimize-tool/
  1. Optimize Geometry on the “Extensions” menu
    https://avogadro.cc/docs/menus/extensions-menu/