Getting started (iText 7)

Tags: tabiText 7
I'm still trying to learn iText and have a few of the concepts down. However I can't figure out what TabStop is or how to use it. My particular problem is that I want to fill the end of all paragraphs with a bunch of dashes. I believe this is called a TabStop and I see the class in the iText API but I have no clue on how to use it.
We have a number of dynamically generated PDFs on our site that were created using iText 2.1.7. However, we also have a large number of users that have disabilities and use screen readers, like JAWS, to render our PDFs. We use the setTagged() method to tag the PDFs, but some elements of the PDF appear out of order. Some even become more jumbled after calling setTagged() !
I create a PDF document using iTextSharp and this code: Document pdfDoc = new Document(PageSize.A4.Rotate(), 10f, 10f, 100f, 0f); I googled but I couldn't find the Envelope size. How do I set the page size as Envelope with Landscape orientation?
I have 2 numbers one above the other, but the first one must have an Strikethrough . I'm using a table and a cell to put both numbers in the table, is there a way to meet my requirement?
I have a label (e.g. "A list of stuff") and some content (e.g. an actual list). I need a specific type of alignment, but I can't find how to achieve this.
I want to display two pieces of content (it may a paragraph or text) to the left and right side on a single line.
Using the DottedLineSeparator class, I am able to a draw dotted line separator. Similarly, is it possible to draw continuous hyphens like '---------------------' as separator in a PdfPCell ?
I use itextsharp and I need to draw a dotted line break from the left to the right of the page (100% width) but I don't know how to do this. The document always has a margin to the left and the right.
I have an Java/Java EE based application wherein I have a requirement to create PDF certificates for various services that will be provided to the users. I am looking for a way to create PDF (no need for digital certificates for now). What is the easiest and convenient way of doing that?
I am getting the errors that cell.setPadding , cell.setHorizontalAlignment , cell.setBorder all are not member of iTextsharp.Text.pdf.PdfPCell . Also table.setWidthPercentage(100) shows the error argument not specified parameter .