You can add, subtract, multiply, and divide numbers in Word table cells. Also, you can calculate averages, percentages, and minimum as well as maximum values.

You can create subdocuments by inserting other files into your master document.

Sometimes, text in Word has text formatting, such as bold, italics, or underlining that you do not need. If you insert some text from an external source or copy/paste it within the same document, you can paste it without the source formatting. Also, you can clear the existing formatting.

Including a large number of in-line pictures in your documents slows down Word's performance. You can improve performance by replacing actual images with picture placeholders.

Double strike or Blackboard bold is a typeface style that is often used for certain symbols in mathematical texts, in which certain lines of the symbol (usually vertical or near-vertical lines) are doubled. The symbols usually denote number sets (see some of usual symbols below).

A flowchart or flow chart usually shows steps of the task, process, or workflow. Word for Microsoft 365 provides many predefined SmartArt templates that you can use to make a flowchart, including visually appealing basic flowchart templates with pictures. However, if you have a process with a tangled flow or you need a custom layout, you can build a complex flowchart in Word using rectangular, diamond, round, and other box types.

A per mille sign ‰ (also mentioned as per mil, per mill, permil, permill, or permille) represents thousandths, 1/10 percent, or the number of thousandths of something in total.

Many documents contain references to headings, tables, images, equations, etc. It is better to create references to the titles or numbers of these items in the document because you don't need to remember and update them after each change. Let Word makes this routine less painful.

Word 365 has an option that allows to use Word document like a board to write some notes anywhere without positioning a cursor. This can help to easily format any kind of document on free style.

Drop Cap is short for dropped initial capital letter. Typically, a drop cap is an oversized, single capital letter designed to stick up above a line of text or to stand out in a block of text.