A computer-operated method for transforming the appearance of a chemical structure entered into a computer wherein at least one alternate equivalent structure is generated within the computer (or by keyboad entry).

Implementations of embodiments described herein reduce the transition duration by a pre-keying mechanism that performs authentication procedures prior to commencement of reassociation procedures.

The desired parameters are entered by the user, typically using toggle buttons, pull-down menus, or keyboard entry.

The switch (5) is bridged by the bridge arm (10) which also includes a device (16) with a keying function.