Although we have thousands of lines of code to be able to generate a PDF, on certain occasions, it is necessary for us to generate a document to be edited later, in this case the easiest thing is to do it with an RTF document.

According to Wikipedia:

Rich Text Format (often abbreviated as RTF) is a computer file format developed by Microsoft in 1987 for cross-platform document exchange. Most word processors are capable of reading and writing RTF documents.1