When importing a file into the external enumerator, a menu containing different tabs (Reactants, products, solvents and Rxn conditions) will be displayed. By adding any of these options, the following page appears:
The displayed fields can be modified, these fields are the same fields configured in the table configuration of the Chemistry Settings (Configuration > chemistry settings > Table configuration). You can add additional fields if you desire, nevertheless, the predefined fields are not completely modifiable, in some cases you can select the default unit, but the composition of the content of these fields is not modifiable.
Note: This configuration is specific for each component, for example, the fields added in Configuration > chemistry settings > Table configuration > Reactant Table, are specific to "Reactants" in the external enumerator, the same happens with products, solvents and Rxn conditions.
For more information about the external enumerators, we invite you to access the Help Center > Signals Notebook > Creating a Parallel Experiment > Enumerating Subexperiments > Enumerating Subexperiments using the External Enumerator File.