Text Area is one of the generic HTML Form input elements. The snapshot of the form shown below is taken from the CRM application found in default Joget's installation package.
Figure 1: Text Area
Figure 2: Text Area Properties
ID: Element ID
Label: Element Label
Value: Default Value
Cols: Size of the element
Rows:Size of the element
Size: Width of the element
Read Only: Determines if this element is editable
Display Field as Label when Read Only: Display the value of the element as plain text when element is set to be as read only.
One may extend the capabilities of this element by adding in Validator as well as mapping the value to a Workflow Variable.
Read more about Validators and Workflow Variables.