Allow a user to draw an atom before a bond

[Benjaki2]

Using the composer, It is necessary to draw a bond before you can draw atom? Would it be hard to enable users to draw an atom first? This appears to be confusing functionality for first time users.

[partridgejiang]

It is possible to draw a single C atom by the Atom and formula - Methane tool. After the first atom being inserted, new bonds can be grown from it. However, since the skeletal structure is mainly based on bond, it should be natural for the chemists to draw bond chains directly in editor, :).