Form field info does not show up unless field is clicked.

Form fields may appear empty before you click them due to the absence of the appearance dictionary. By setting false to SetDefaultAppearance(false) method in PdfForm class, will create an own appearance dictionary. Doing this will make the text visible in all the PDF viewers.

Refer to the following code example.

C#

            //Load the PDF document.
 
            PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
 
            //Get the loaded form.
 
            PdfLoadedForm loadedForm = loadedDocument.Form;
 
            //Get the loaded text box field and fill it.
 
            PdfLoadedTextBoxField loadedTextBoxField = loadedForm.Fields[0] as PdfLoadedTextBoxField;
 
            loadedTextBoxField.Text = "1";
 
            //Set the default appearance.
 
            loadedForm.SetDefaultAppearance(false);
 
            //Save the modified document.
 
            loadedDocument.Save("sample.pdf");
 
            //Close the document
 
            loadedDocument.Close(true);

Sample Link - https://www.syncfusion.com/downloads/support/directtrac/general/ze/FormFillingSample-407788045

Note:

Starting with v16.2.0.x, if you reference Syncfusion® assemblies from the trial setup or the NuGet feed, include a license key in your projects. Refer to the link to learn about generating and registering the Syncfusion® license key in your application to use the components without a trial message.

Conclusion:

I hope you enjoyed learning about Form field info does not show up unless field is clicked.

You can refer to our Flutter PDF feature tour page to learn about its other groundbreaking features and documentation, and how to quickly get started with configuration specifications. You can also explore our Flutter PDF Flutter PDF examples to understand how to create and manipulate data.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion®, you can try our 30-day free trial to explore our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums or feedback portal. We are always happy to assist you!