To create custom fields on Captello, follow the steps below:
Navigate to Setup > App Setup > Manage Fields
Click on 'New'
Select the desired field type.
If you are going to sync data from the field to your CRM, make sure the data type (Number vs Text vs Boolean) is the same as the field in your CRM.
Name the field, change the identifier if needed (used by the API and for merge-fielding).
In case of multi-selection fields and drop-down fields, you will need to add at least 1 value, and will have the option to restrict the pick-list values.
The values added here can be used to pre-fill fields in capture forms, by selecting the field from 'Data source'. This is useful to prefill fields in multiple forms with your data source without the need to import the values in each form individually.
Note that selecting a data source is different than field mapping. A form element can be mapped to a field, and have a data source of a different field.
Once you're done, click 'Save'.
The newly created field will now start appearing in prospect profiles and in capture form field mapping!