CreateCircleAnnotation creates a circle/ellipse annotation object with appearance stream that can be added to page PDF annotations.

CreateLineAnnotation creates a line annotation object that can be added to page PDF annotations.

CreateRectangleAnnotation creates a rectangle annotation object that can be added to page PDF annotations.

NewCheckboxField generates a new checkbox field with partial name `name` at location `rect` on specified `page` and with field specific options `opt`.

NewComboboxField generates a new combobox form field with partial name `name` at location `rect` on specified `page` and with field specific options `opt`.

NewSignatureField returns a new signature field with a visible appearance containing the specified signature lines and styled according to the specified options.

NewSignatureFieldOpts returns a new initialized instance of options used to generate a signature appearance.

NewSignatureLine returns a new signature line displayed as a part of the signature field appearance.

NewTextField generates a new text field with partial name `name` at location specified by `rect` on given `page` and with field specific options `opt`.

AppearanceStyle defines style parameters for appearance stream generation.

CheckboxFieldOptions defines optional parameters for a checkbox field a form.

ComboboxFieldOptions defines optional parameters for a combobox form field.

FieldAppearance implements interface model.FieldAppearanceGenerator and generates appearance streams for fields taking into account what value is in the field.

LineAnnotationDef defines a line between point 1 (X1,Y1) and point 2 (X2,Y2).

RectangleAnnotationDef is a rectangle defined with a specified Width and Height and a lower left corner at (X,Y).

SignatureFieldOpts represents a set of options used to configure an appearance widget dictionary.

SignatureLine represents a line of information in the signature field appearance.

TextFieldOptions defines optional parameter for a text field in a form.