The Edit Menu

Undo

Recovers the state of the frame before the last operation that you did.

Undo

Redos the last undo.

New (applet only)

Cleans the document (in the standalone up, there is a New item in the File menu).

Cut Selected

Removes the selected part from the model.

Select all

Selects and marks all atoms in the molecule, so that it can be rotated, moved, deleted, etc. This is the only chance to recover parts of the molecule that are outside the display area - select all, go into move mode and move the molecule using a visible part of it.

Hydrogens

Add Implicit Hydrogens

If switched on, implicit hydrogens will be calculated for all atoms and added. As long as the mode is switched on, the implict hydrogen count will be adjusted. Note that:

  • The implict hydrogens will be only visible when the option "Show implicit hydrogens when the atom symbol is shown" is selected in View -> Options (default: on). For which atoms the symbols are visible is controlled by other settings here. If the hydrogens will be contained in an exported file, depends on the file format.(e. g. CML has got implicit Hs, mol has not).
  • Make Hydrogens Explicit

    This will transform implicit hydrogens to separate atoms connected by a single bond. This will only have an effect if you are in implicit mode (see "Add implicit Hydrogens")

    Make Hydrogens Implicit

    This will delete bonds to hydrogens and add hydrogens directly to their parent atoms as implicit hydrogens.

    Adjust Bond Orders

    Sets the order of all bonds so that every atom is saturated.

    Reset Bond Orders

    Sets the order of all bonds to single.

    Clean Up

    This changes coordinates of atoms a length of bonds to standard representation.

    Model Properties

    Changes properties for this frame. Current properties are: author (who generated this model), generation date and software. Additionally, a cas number and checksum can be given.