This happens if the file is used by another process so saving is blocked or when you're using an older version of Acrobat like 9, X oder XI. Try to save the file with another name, when applying the usage rights. In case you're using such old version of Acrobat, you can't reader enable the PDF anymo...

They are still there but now under Menu > Form options. 

The PDF-Security settings is the right spot for this. Select the allowed changes and then save your form. You'll be asked to set a password for the, which will be neccessary to edit the form in Designer but not when viewing in a PDF viewer. 

Use just one content area in your form. On you body page then place a subform that flows left to right. In this you put two other subforms flowing top to bottom, one for the main content and one for the additional.

I've testet this and was able to create a repeated and also dynamic header for a subsequent page. However it might be tricky to get this work as intended, since the XFA specs recommend static headers in flowing layouts.  If you know the maximum of possible columns, you could build one static header ...

Creating a dynamic table with multiple columns is not so complicated. You only need to wrap the the fields in all rows the are in the same column with a subform that ist set to be repeatable, like in this example.  Then you need a script that controls the table. Here it's placed in the exit event of...

This is an AcroForm made with Adobe Acobat not with AEM Forms. This is a totally different type of PDF form. AcroForms are static and can't change the layout dynamically. The ony thing you can do is to cover the sections to be hidden with a white, read-only button or field. Then you add a script to ...

A static form can't have any dynamic elements. To do so you need a dynamic form. There you can add, remove, show or hide columns by placing subforms in the table cells. Those subforms can be controlled as usual. 

Hi, to start with XFA forms, you should check this source. It hat many useful samples.http://assuredynamics.com/index.php/code-solutions/ You can repeat pages of your form the same way as you do with table rows. Both are technically subforms and can be set to have multiple occurences. Those will inc...

Hi, to be honest: You coding isn't great but overcomplicated. Why do you use the this.resolveNode() method? It's lazy and not needed when the elements in the hierarchy (subforms, fields etc.) are named well.You just have to image the location to the object that executes the script relative to the ob...