Special Toolbars

These toolbars are not visible by default. To make one visible select its checkbox in the View > Toolbars submenu.
The following special toolbars are available in MarvinSketch:

• Chemical Toolbar
• Markush Toolbar
• 3D Editing Toolbar

Chemical Toolbar

This toolbar contains chemical functions and it is not visible by default.
To make it visible, choose View > Toolbars > Chemical.

Toolbar item	Icon	Description
Clean and Arrange in 2D		Cleans structures and positions them to the center of the canvas.
Clean 2D		Calculates new 2D coordinates for the molecule.
Clean 3D		Calculates new 3D coordinates for the molecule. Clean3D builds up conformers of fragments from which the best, that is, the lowest energy conformer is given back. The quality of the structures is measured by a simple energy function (Dreiding-type molecular mechanics).
Convert to Aromatic Form		Transforms the molecule to aromatic representation using the transformation method set.
Convert to Kekulé Form		Transforms the molecule to non-aromatic representation.

Markush Toolbar

This toolbar contains functions that help to work with Markush structures and it is not visible by default.
To make it visible, choose View > Toolbars > Markush.

Toolbar item	Icon	Description
Position Variation Bond		Creates a variable point of attachment to represent a connection point to a group of atoms.
Frequency Variation		Creates a repeating unit with repetition ranges. For interpretation of range see repeating unit limitations.
R-group Attachment		Adds an attachment to the structure.

3D Editing Toolbar

This toolbar is not visible by default. It contains functions that can be useful in editing the structures in 3D.
To make it visible, choose View > Toolbars > 3D editing.

Toolbar item	Icon	Description
Assign Atoms		Maps atoms to merge.
Merge		Merges assigned atoms.
3D Plane		Alters the coordinates of the molecule to put the 3 selected atoms of the molecule onto the plane of the canvas.
New Substituent		Adds a new fragment to the canvas.