This field comes in two different versions, Choice List and Choice List Multi Select. The first one is recommended for information where you need to select a single element from a list of options, while the second one will allow you to select multiple elements from that list of options.
In order to create a Choice List field, you need to create first the Choice List with the options. To learn more about how to create it, please visit the following tutorial:
Manage Choice Lists
Configuring a Choice List Field
Give your field a name and add a field hint if desired. You can then select the section in which the field will be created or keep the default option.
The field type must be set to 'Choice List'.
In the Choice list field, you will need to select the Choice List you created previously.
Note: The same Choice List can be used to create different Choice List Fields.
Enable the 'Required' checkbox if the information for this field is mandatory. It means that if you enable this option, every time a team member creates a new record, they will need to input the information for this field in order to save it.
If you enable the 'Lock After Create' as its name implies, the field will be locked once the new record is saved and the value of the field will not be editable afterward.
Once you are done setting your field, click the save button.
Note: All new fields are added at the bottom of the form.
Configuring a Choice List Multi Select Field
Follow the same steps described in the section above, the only difference should be the type, that must be set to 'Choice List Multi Select'.