Assigning to a field usually have two cases, one field is assigned to a single value, the other one is assigned a plurality of values, the same steps, but will be slightly different wording:
1, a single value: the value written on the inside directly on it
2, multiple values :( "United States" |. " United Kingdom"), this position should be noted that, if it is the case and there is a value more space, use "" This way, "Although you can enclose assignment, but will block the current selections [( "United States" | "United Kingdom") ] displayed directly
Text Object example paper, other visualization Similarly, the following steps: