It's Summer in the US, which means that it's really hot there's a new Terminal preview release!

Here's what's in it:

Features

• Selecting text in the terminal just got better!
  • Use the markMode action to enter mark mode and create a selection at the cursor (#13053) (#13358)
    • This is bound to Ctrl+Shift+M by default. Be sure to try it out!
  • Selections made with the keyboard now display a selection marker UI (#10865)
  • Use the switchSelectionEndpoint action to switch which endpoint you are moving in a selection (#13370)
  • Use the toggleBlockSelection action to transform your existing selection into a block selection (#13219)
• [Experimental] We now support scrollbar marks! (#12948) (#13163) (#13291) (#13414)
  • Use the addMark action to add a scrollbar mark
    • The color optional parameter can be used to specify a color
  • Use the scrollToMark action with a specified direction parameter to scroll between the marks
  • Use the clearMark action to remove a selected mark
  • Use the clearAllMarks action to remove all scrollbar marks
  • The experimental.autoMarkPrompts profile setting can be set to true to automatically mark each prompt
    • NOTE: This uses the FTCS_PROMPT sequence from FinalTerm, OSC 133 ; A, which we now support! (#13163)
  • The experimental.showMarksOnScrollbar profile setting can also be set to true to display the marks on your scrollbar
• If you're new to Windows Terminal Preview, but already have Windows Terminal installed and customized, we now migrate your settings over (#12907) (thanks @huiyooumich!)
• The tab's context menu now has "Find" as an option (#13055) (thanks @Predelnik!)

Changes

• "Open settings file" commands now explicitly mention "JSON" for easier searching (#13265)
• Color schemes now support "purple" and "magenta" interchangeably in the JSON (#13261) (thanks @matthewd673!)
• An accelerator key is now defined for the "Open in Terminal" shell extension (#13080) (thanks @ianjoneill!)
• The settings UI's "Save" pane now aligns with the "Open JSON file" footer (#13282) (thanks @HO-COOH!)
• The Default Terminal setting in settings UI now has a "Let Windows decide" option (#13160)
  • An occasional crash while opening the settings UI has been stomped out (same PR!)
• The "Save" and "Discard changes" buttons were reordered in the settings UI to more closely follow the Windows UI guidelines (#13237)
• @dansmor7 has refined how colored tabs look when they're out of focus or hovered (#13434) (thanks!)

More Escape Sequences and expanded VT support

Courtesy of @j4james:

• Applications can now use DECCTR to alter the terminal's color scheme (#13139) (#13227)
• The same applications can now use DECAC to assign a color to the default foreground and background colors, as well as change the tab background color (#13058)
• Other applications can now use DECPS to play a basic sequence of musical notes (#13208)
  • This feature is preview-only until we can make sure the MIDI sound font is available everywhere Stable ships.

Documentation

• building.md and mouseInput.cpp got cleaned up a bit (#13333) (thanks @ofek and @oferze!)
• We added a Gannt chart to the roadmap (#13234)

On the back end...

• @lhecker rewrote how we handle coordinates across the project, paving the way for a longer scrollback history and removing a bunch of sources of assertion failures; if you see anything weird that seems like a coordinate system issue, please file it! (#13025)

Bug Fixes

• We no longer suppress black background or gray foreground for PowerShell (#13352)
  • We have chosen to remove this workaround as newer versions of PowerShell's PSReadline component contain a fix for the issue.
  • This was a compatibility band-aid that was impacting the capabilities of great projects such as Oh My Posh.
  • ❗ If you see unexpected black backgrounds appearing behind text while typing a command in PowerShell, make sure your PSReadline version is up to date. You can update your version of PSReadline by running the command, Update-Module PSReadline.
• The Default Terminal banner is now hidden if you opened a session via default terminal (#13344)
  • AKA: We won't nag you to set Terminal as your default if it's demonstrably the default ;P
• [O is no longer output erroneously from focus events for clients of libuv like neovim (#13260)
• AtlasEngine no longer secretly increases the font size of HTML/RTF copies when the font changes (#13384)
• Keyboard selection is now limited to the scrollable area (#13318)
• The "Open in Terminal" shell extension is now hidden when accessing a non-filesystem path like "Quick Actions" (#13206) (thanks @leejy12!)
• Clearing the screen via cls or Clear-Host won't leave behind an erroneous line of text (#13324) (thanks @j4james!)
• Default Terminal sessions now properly pass focus events when opened (#13247)
• Terminal will now use Unicode 14.0 to determine the width of some Unicode characters (#13292)
• We will no longer try to launch wsl to ask it to tell us about distributions when it's obvious that you don't have any (#13436)
• We've fixed a minor race condition in default terminal handoff that impacted nobody (#13410)

Reliability

• We no longer crash when a screen reader is reading from a CLI app using the alt buffer (#13250) (#13244)
• Deleting the last profile in the settings UI no longer causes a crash (#13242)
• Opening Windows Terminal via the Win+X menu no longer occasionally crashes (#13212)
• SetConsoleWindowInfo can no longer crash a terminal tab (#13212)