As we already know that today Microsoft pushes Windows 10 Insider Preview Build 17618 (RS5) to Windows Insiders who have opted into Skip Ahead.

The build brings back the Sets feature which was disabled in the past few builds. Also, include support for some Win32 apps in Sets.

With Sets, 1st party experiences like Mail, Calendar, OneNote, MSN News, Windows and Microsoft Edge become more integrated to create a seamless experience, so you can get back to what’s important and be productive, recapturing that moment, saving time – we believe that’s the true value of Sets.

This build also comes with following improvements to Sets.

Improvement:

  • Support for desktop (Win32) apps. Sets now support File Explorer, Notepad, Command Prompt, and PowerShell. One of the top feature requests by Insiders has been tabs for File Explorer and with Sets you can get a tabbed File Explorer experience! Try it out with these apps and let us know what you think!
  • You can now launch apps from the new tab page by typing the app name into the search box.
  • UWP apps are launched in the same window replacing the new tab page.
  • The tab UI in Sets now shows icons including website favicons and app icons.
  • Resume your project with more control – When restoring your projects you’ll be prompted to restore related apps and webpages. In Timeline you’ll see when a project has multiple activities associated with it.

Here are a few keyboard shortcuts you can try out:

  • Ctrl + Win + Tab – switch to next tab.
  • Ctrl + Win + Shift + Tab – switch to previous tab.
  • Ctrl + Win + T – open a new tab.
  • Ctrl + Win + W – close current tab.

Here are a few things we’re still working on that aren’t quite finished yet:

  • Tab drag-and-drop does not work for re-ordering tabs. You can’t drag a tab to join another window.
  • When launching a supported desktop (Win32) app from a tabbed window, such as protocol/file launch or from the new tab page, it launches in a new window instead of auto-grouping to the existing window. You can work around this for now by holding down the Ctrl key while launching a supported desktop (Win32) app – note, for File Explorer, in particular, you will need to hold down Ctrl until the new tab with File Explorer appears, not just Ctrl + click and immediately release.
  • You may notice some flashes when switching between tabs within a Set.
  • If your display scaling is higher than 100%, using touch to interact with the Sets title bar won’t work.

If needed, you can find a setting to enable or disable Sets under Settings > System > Multitasking.