There are certain office programs that have a name that says more of them than the description of their functions, such as this program whose explicit and very long full name is Add and append data and text and characters to multiple text files.
Add and append data and text (reduced version of the name) is a practical tool to automatically add new data to text files, such as inserting a header or footer in all of them, as well as some additional texts. The operation is very simple, you just have to select the files to be expanded and the new text that will be inserted, and the change will occur in all of them.
You can configure, in Add and append data and text, how the new insertions will be (at the beginning, at the end or in the middle of the document). It is also possible to specify that the new text be added after another specific document; that is, locate a phrase or a piece of text in that document, and, once located, insert the new text behind.
You can free download Add and append data and text 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.