The Datum Edit Dialog is used to add or edit an individual datum listed in the Composition Dependent Data Dialog and the Composition Dependent All Data Dialog. The dialog is activated by clicking the left mouse button on a row in the data table control or selecting a row and pressing the Edit button.

The Datum Edit Dialog enables you to enter values for the compositions, datum, and supporting information.

1	Units Controls: enables you to specify the composition units of the current datum.
2	Component Controls: displays each of the components of the current mixture.
3	Composition Controls: enables you to enter compositions for each component.
4	Composition Accuracy Controls: enables you to enter the accuracy of each entered composition.
5	Molality/Molarity Solvent Control: enables you to select which component will be used to convert molality/molarity values into common units. See the molal units and molar units documentation for details.
6	Molarity Density Control: enables you to enter the solution density which will be used to convert molality/molarity values into common units. See the molal units and molar units documentation for details.
7	Molarity Density Units Control: enables you to enter the units in which the solution density is given.
8	Value Control: enables you to enter the datum's physical property value.
9	Value Accuracy Control: enables you to enter the accuracy of the entered physical property value.
10	Units Control: enables you specify the units in which the physical property value was entered.
11	Reference Control: the Reference control enables you to enter the identifier of the reference from which you obtained the property's datum value. You can type in a value or use the dropdown list to select a recently entered value. Entering a reference is optional but highly recommended.
12	List Button: pressing the List button displays the Reference Selection dialog. This dialog enables you to select the identifier of any reference in the current document. (See the All Entities dialog documentation for more details on selecting references.)
13	Comments Control: the Comments control enables you to enter general information to better describe the entered value. Very often comments document the date of entry, the name of the person who entered the value, or assumptions about the entered value.
14	Date, Phrase, Set Buttons: these buttons provide standard operations to help you enter comments. Pressing the Date button inserts the current date and time into the comment control. Pressing the Phrase button inserts the stored 'common phrase' into the comment control. Pressing the Set button enables you to change the 'common phrase'. (See documentation on the Set Phrase dialog for details.
15	X Default Button: activates the Default Compositions Dialog which enables to select a default composition which will be entered into the composition controls. See below for documentation.
16	X Total Button: activates the Residual Composition Dialog which displays the current composition total and enables to assign the residual composition to an unassigned composition control. See below for documentation.
17	Show Ref Button: pressing the Show Ref button will display the document associated with cited reference. The location of this document is stored in the reference's Document Location Section.

Selecting a row in the Default Composition table control and pressing the OK button will insert the selected compositions into the Datum Edit dialog's composition controls.

1	Composition Total Control: displays the total of all entered compositions.
2	Units Control: displays the Phase Equilibria Estimate Dialog's currently selected composition units. Note that these units may be different from the current units being used in the application.
3	Residual Component Control: if there is only one component with an unassigned composition, this control displays that component's name.
4	Residual Concentration Control: if there is only one component with an unassigned composition, this control displays that component's composition that would bring the composition total to a value of 1 or 100, depending upon the current units.
5	Set Residue Button: if there is only one component with an unassigned composition and if there is a valid residual composition, pressing this button assigns the residual composition to the unassigned composition control.

Topic	Description
Getting Started using Synapse	provides a quick tour of Synapse's capabilities including examples of chemical product design.
Getting Started using Cranium	provides a quick tour of Cranium's capabilities including a discussion of structure editing.
Estimating Chemical Properties	a short video demonstrating how to estimate the physical properties of chemicals using either Synapse or Cranium.
Estimating Mixture Properties	a short video demonstrating how to estimate the physical properties of mixtures using either Synapse or Cranium.