The TextBox tool can be used to capture values of keywords, or any other element but images, when text cannot be parsed with the Keyword option. This includes cases when there is no “key” value and the text has no definite size or structure.
To use the TextBox option, you should first use the Anchor tool to define anchors for the value and only then mark the appropriate keyword value to be parsed. If no anchors exist on the same page, the system will try to create one automatically, by creating an anchor over other objects like Keywords and Tables. If the process fails, the text box will not be created.
NOTE The output of a text box is a string, unlike the Keyword option that "breaks" the captured text into keys and values.