Protecting Content in LibreOffice Writer form unpremeditated changes

On last week Mike Kaganski (one form Russian developers) asks me to correct a few things in the Help. In the fact, the speech was about addition a few strings in an article about protection of contents in LibreOffice Writer. But, when I started to work with the article, I understood that the article must be completely rewritten. I pushed the patch to gerryt. And I hope that the article will be available already in the Help of 5.3 version. In the blog, I would like to give additional explanations and at the same time to tell about some things which was not appropriate for the Help, in my opinion.

SUM, AutoSum and some other secrets of LibreOffice Calc

When I started to write this article, I thought it would be brief note for beginners. But in the process of writing, I found quite a lot of information that was illuminated within this theme. As a result, the article grew to pretty large size. And I hope that the material presented here will be useful not only to people beginning their way into Calc, but also for people who have long enjoyed a spreadsheet.