String
Lets you add a string entry field in your form
Object designer
The placeholder setting lets you add a message directly inside the String field but only displayed when there the String value is empty. Description lets you add some help string displayed just below the field.
Object parameters
Double-click on the object to edit it. Object parameters dialog will pop up.
Password
This will transform your string field into a Password field where all entered characters are replaced with * char.
Key
The key field lets you define a unique name to your field. Key value will be read and updated in the context
{
"string" : "string"
}
Placeholder
Lets you display a short message to the user when the field is empty