What works differently from ChemDraw

No save button

Every change is kept as you make it. Documents live in Home, and in your arbastro account when you are signed in. To make a file, use Export. See Where your work is saved.

Problems are flagged, never fixed behind your back

Athanor checks every structure as you draw. A carbon with five bonds stays the way you drew it, and the issues badge at the bottom left of the canvas counts it. Click the badge to see the list, with each problem named.

Missing stereo shows up the same way, as a warning, for example "C's configuration is not drawn" when a stereocenter has no wedge.

Actions sit beside the selection

Select something and a bar of actions appears just above it: align, flip, rotate, group, lock, copy and more, chosen for what you selected. Everything in it is also in the Main menu. See The Athanor window.

Tabs and Home

Each document opens in a tab, and Home lists all of them. See How to work with tabs.

Dimmed commands say why

A command that cannot run right now is still listed in the menus and in Search everything, dimmed, with the reason, for example "Select a ring first".

Built for working together

Signed in, you can share a document, comment on it and edit it with other people at the same time.