In previous versions of Visualizer, when I sketched a molecule I would then click on the H button to add hydrogens. In 2.5, which I just downloaded, the add hydrogen (and delete hydrogens) buttons are inactive. In order to activate them, and to add hydrogens, I first need to go to Chemistry > Hydrogens > Add. After that the buttons work fine. The problem seems to be that the button that is on the toolbar in 2.5 is the show hydrogen rather than add hydrogen button. This is a change from previous versions. Was it an intentional change? It would be nice to be able add hydrogens to a new sketch directly from the toolbar.

Cheers,

Flick Coleman

William F Coleman
Professor of Chemistry
Wellesley College