PdfTextField.Multiline Property

public bool Multiline { get; set; }

Public Property Multiline As Boolean
	Get
	Set

Property Value

If true, the text field can contain multiple lines of text; if false, the form field's text is restricted to a single line.

Multi-line text form fields are vertically aligned to the top of the field. Single-line text form fields are vertiically aligned to the middle of the field.

This property can not be changed if IsLocked is true.

Reference