Tabbed Viewing Feature in WPS Office
WPS Office 2016 Tabbed Viewing Feature

Lets you open multiple documents, without opening multiple instances
Much like a modern web browser which allows you to open multiple web pages as tabs under the same window, WPS Office Tabbed Viewing feature offers you the same convenience in Writer, Spreadsheets and Presentations.
The WPS Office interface is designed for your convenience and to help maximize efficiency.This feature alone saves time,improves functionality and usability compared to other less innovative office suites. It eliminates the common problem that you may have encounter when working with other word processors, spreadsheet software and presentation programs like Microsoft Word, Excel and PowerPoint, of slowing down your computer with too many programs running at once.Advantages of WPS Office tab feature
Unlike Microsoft Office, which opens a new instance of itself every time you want to open or create a new document, WPS Office tabbed viewing feature allows you to open multiple documents within the same window.This eliminates the problem of having too many documents / workbooks / presentations open at one time, which can slow down your computer terribly when each document is in another running copy of your office suite! Also, just like today web browsers, you can conveniently switch between documents in one window with a click of the mouse, or by using the keyboard shortcut(Ctrl+Tab).
Save time by using tabs
The ability to create document tabs not only allows you to easily see what documents you have open, but also, more importantly, saves you time not spent trying looking through window after window looking for a certain document.
Organize Tab Order
You can organize the order of tabs by clicking and dragging a document tab left or right to the desired location, giving you control on how to sort your documents based on each ones importance.
Open or Close Tabs Quickly
WPS Office tab feature is built to save you time. You can quickly close a document by double clicking on it tab, or create a new blank document by clicking on the + (Plus) button to the right of the tabs or using the keyboard shortcut (Ctrl+N).
Save All Documents with One Click
Right clicking on the tab allows some quick functions including Close Window, Save, Save As, Save All, Close Other Windows and Close All, which is a more practical way of saving work, it avoids a situation where you is not sure what documents are open and may have to re-check or in rare circumstances save the document under the wrong name.