How do I get this environment

I would love to have this Environment of a working place of a famous mathematician Harvey Friedman.

How do I open it in the Libre Office?
EDIT
Yes I need

A user interface like in my screenshot (which application is it? what are the components of the UI?)?

Please edit your question to elaborate a bit.

What do you want? A user interface like in your screenshot (which application is it? what are the components of the UI?)?

A graphic charter for your documents resembling the mechanical typewriter era? In this case, create your styles and store them in a template you make default.

Something else? A multiwindow environment with a document processor, communication device, … Modern graphical OSes already offer this.

Please do not use Add Answer but edit your original question to enhance the details of your question (answers are reserved for solutions to a problem on this Q&A site).

And also remove ask.libreoffice.org from the tags as your question is not related to problems of this site but apparently to Writer. Press Enter twice to exit retag mode.

Do you want a Word-like ribbon UI? IMHO, this is not to be recommended. You should learn to work with styles, but YMMV.

I do not understand your abbreviations. I need exactly what is in the snippet, it’s functionality and appearance of the GUI.

Your attached image is so blurry. Please convert your screenshots into a decreased color-depth, lossless compressed PNG file format before you upload them here.

IMHO: “In My Humble Opinion”

YMMV: “Your Mileage May Vary”

Not sure exactly what you want.

Assuming you have LO version 7.x, you can try to select a different user interface (UI) with View>User Interface>`…

The first three (Standard Toolbar, Single Toolbar and Sidebar) are variant of the usual UI, keeping the menu bar. The last four (Tabbed, Tabbed Compact, Goupedbar Compact, Single Context) get rid of the menu bar which makes sometimes difficult to change the UI.

Look then for the small icon at top right looking like (three horizontal bars). This is where the menus are hidden. In the last case, you have a button labelled Menu.

In case, this does not answer your question, edit to better describe with words your expectation.

However, my personal opinion is such a UI is faulty because it does not encourage to use the founding principles of Writer (styles) which greatly simplify composition and maintenance of sophisticated documents. But user tastes and work habits differ with every person.

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In case you need clarification, edit your question (not an answer which is reserved for solutions) or comment the relevant answer.

Probably my Question is ill-posed from it’s very beginning mainly because I’m almost new to LO.
The best I can do is to show this video which shows my aim. I.e. I would like to have as many rows as are there and then slowly learn how to use the various buttons. BTW, Is there a hard copy book about LO from which I can learn from my hands rather than from my LCD screen ?

Going through a 1 hour 18 minutes video is not the most concise way of describing your goal. All the more when the video looks to me as a lecture in maths and not a demo about some software application. So try to describe with words in the form of a specification what you are looking for.

An introduction to LO is the Writer Guide. You can download it for free. There are paperback copies but I don’t think the physical book exists for Writer 7.x.

You can also download/buy Bruce Byfield’s excellent Designing with LibreOffice which displays a progressive approach to the core features of Writer making it so powerful.

You really do not need to go through the entire video since the environment is all of the time the very same. The link to the video was meant to answer the objection that I’ve uploaded a blurry snippet.

Yes but I don’t see the point. Computer is an Apple one. Application looks like M$ Word. Formatting of the document is a sin against usual paper formatting (as commonly set with LaTeX): typewriter-like formatting has long passed out of fashion. Video is also blurred but I kind of read .docx which confirms Word.

Is your request about document content or the various toolbars we can see above document text? If it is a matter of toolbars, see my answer. 7.x allow you to choose something similar. But I already warned you it will send you onto wrong formatting paths driving you away from the recommended Writer work flow. Such a “bad” (personal opinion) UI was provided to ease transition from Word to Writer but it hides the important point of styles.

Thank you for your help. I’m not a native speaker so I do not follow everything as intended in your comment. The answer is Yes: my request about document content of the various toolbars we can see above document . Also, I do not follow your last sentence: Such a "bad" (personal opinion) UI was provided to ease transition from Word to Writer but it hides the important point of styles. ; it would be nice if you could rephrase it so that I can follow what do you mean by transitions and styles there. Of course I’ve look up all the words in that sentence in a dictionary but I cannot get the meaning out of it. So is there an easy way to obtain all the toolbars from the above part of .odt in that video ?
BTW, When will LO 7.1. book come out in hard copy as a book ?

To change the user interface, use menu View>User Interface> as per my answer.

“Bad UI”: Word has shaped the world in such a way that people make it “the” absolute reference, never questioning the validity of many design decisions. In Word, you define a general look of a paragraph with a “style” and everything else is made with buttons or keyboard shortcuts. A style is a set of typographical (font face, size, weight, …) and geometric attributes (indents, spacing, border, …) grouped as a named collection. Then when you “style” some text, all attributes are simultaneously applied without the need for you to apply them manually (and without the risk of forgetting to apply one).

Writer has developed the notion of styles much further than Word: you have the obvious paragraph style, but also character ones to differentiate words within a paragraph, page styles for page layout and header/footer, frame styles for object insertions like (to be continued)

(…) pictures or small independent bits of text (side notes) and even list styles which have received a disconcerting name because they describe numbering format for numbered lists and chapter numbering.

Writer is based on styles and styles when consistently used allow a lot of automation in the process of writing a book and tuning its format. Examples of automated actions: automatic table of contents and alphabetical index, automatic numbering and indexing of figures, tables, pictures, …, alternation between page formats (odd/even pages with distinct geometric properties).

What you are looking for is nothing but trying to have Writer displaying Word interface and behaving like Word instead of learning its founding principles to use it at best.

I consider that as soon as you document is more than 3 pages long, Word work flow is wrong and requires more time to achieve your task than Writer. Even for really short one-time documents, (to be continued)

(…), Writer templates bring you full power for the same amount of work (or even less). A template is a skeleton document where you have stored your styles and optionally initial content. For exemple, a letter template may already contain the date (dynamic: it will be set at the currect date when you open the template), a “subject” line, a content place holder, a formal salutation, your name where you’ll sign and your postal and phone coordinates.

By “transition”, I mean an attempt to not disconcert or “surprise” Word users trying to switch to Writer. But this postpones using optimally Writer because Word habits will persist longer.

I don’t know when the 7.x Writer Guide is released but the 6.x one is a good start. Only the layout and wording of some menus will be different.

PS: I am not a native English speaker as well.