What is Ctrl + U keyboard shortcut for?

Popular programs using this shortcut

What this shortcut does in different programs?

1. PlayerUnknown's Battlegrounds - Toggle UI
2. Discord - Toggle channel member list
3. Krita 3.0 - HSV/HSL adjust
4. Notepad++ - Convert to lower case
5. Total Commander - Swap left and right view

All programs

All programs using this shortcut, by category.

General

Arch Linux - Cut everything from line start to cursor

Ardour - All enclosed by edit range

Audacity - Mute All Tracks

BlackBerry Classic - Underline

E-Sword - Underline Editors only

Feedreader - Refresh article list

Firefox Quantum - Page source

GoldWave - AutoTrims the sound.  Removes silences within the ends of the selection.

Google Chrome - Display non-editable HTML source code for the current page

Microsoft Edge - View source

Microsoft Photos App - Remove selected items from album

Mozilla Thunderbird - View message source

Opera - Clear all

Opera - Toggle text-style underline

Opera - Go to previous unread message

Quicken 2018 - Go to the Portfolio

Red Hat Enterprise Linux - Clear the current line in terminal

Roll20 - Add selected object(s) to turn tracker

Ubuntu - Underline the selected text

uTorrent - Add new torrent from URL

Text editing

Ace Editor - Change to upper case

Brackets - Undo selection

Brackets - To Upper Case

Brackets - Undo last selection change

FocusWriter - Underline

gedit - Convert the selected text to upper case

KompoZer - Text style Underline

Metapad - Transparent mode

Microsoft FrontPage - Apply an underline.

Microsoft OneNote - Apply underline to or remove it from the selected text

Microsoft Word 2016 - Apply an underline

Notepad2 - Make lowercase

Nuance Power PDF - Display / hide gridlines

PDF-XChange Editor - Underline

Sublime Text - soft undo; jumps to your last change before undoing change when repeated

Text editing - Underline

TextRoom - Underline

Wordpad - Underline selected text

WriteMonkey - Soft undo

ZenWriter 2 - Underline

Zim - Make selected text underline (renders highlighted)

Imaging

Adobe Animate CC (Windows) - Ungroup

Adobe Illustrator - Show/ hide smart guides

Adobe Lightroom Classic - Auto tone

Adobe Premiere Pro (Windows) - Underline

Affinity Designer - Underline

Affinity Designer - HSL (Adjustment)

Blender - Save User Settings

Clip Studio Paint Pro - Tonal correction: Hue/Saturation/Luminosity

Corel Painter - Ungroup

Corel Painter - Ungroup

CorelDRAW Graphics Suite 2018 - Ungroup

Inkscape - Ungroup selected group(s)

Inkscape - toggle Unicode entry

IrfanView - Custom rotation dialog

Krita 3.0 - HSV/HSL adjust

LDView - Right side up

LightWave 3D - Unweld polygons

LightWave 3D - UnParent bone

Microsoft Paint - Underline selected text

Nuke - Enable or disable previewing output on an external broadcast video monitor

Siemens NX - Execute > NX Open

System tools

Bash (Unix shell) - Cut the part of the line before the cursor and add it to the clipboard

Cisco IOS - Delete all characters from the cursor to the beginning of the command line

Everything - Toggle match path

Developer tools

Android Studio - Go to super-method/super-class

Atom (Windows) - This undoes the previous selection, like from Select Same Words

Atom (Windows) - (Source: Find And Replace) find-and-replace:select-undo

AWS Cloud9 IDE (Windows) - Open Tree Panel

AWS Cloud9 IDE (Windows) - To Uppercase

Chrome DevTools - Select / de-select the next occurrence of whatever word the cursor is on. Each occurrence is highlighted simultaneously

CodeMirror - Undo the last change to the selection, or if there are no selection-only changes at the top of the history, undo the last change

CoffeeCup HTML Editor - Underline

FileMaker - Preview mode

FileMaker - Select tables with the same source table

Git Tower (Windows) - Push HEAD

HeidiSQL - Uppercase block

IntelliJ IDEA (Windows, Linux) - Go to super-method/ super-class

IPython Shell - Cut text from beginning of line to cursor

jEdit - Select to marker with shortcut key.

Komodo Edit - Make uppercase

Microsoft Visual Studio 2017 (All shortcuts) - Format.Underline

Microsoft Visual Studio 2017 (All shortcuts) - Edit.MakeLowercase

Microsoft Visual Studio 2017 (All shortcuts) - Image.UseSelectionasBrush

Notepad++ - Convert to lower case

PyCharm 2018.2 - Navigate to a super method declaration of a method under the caret.

Qt Creator - Select the current block (The second press extends the selection to the parent block. To enable this behavior, select Tools> Options > Text Editor > Behavior > Enable smart selection changing)

RStudio - Yank line up to cursor

RStudio (Mac) - Yank line up to cursor

SQL Server Management Studio (SSMS) - Make the selected text lower case

Valentina Studio - Make Selection Lower

Visual Studio Code (Linux) - Undo last cursor operation

Visual Studio Code (Windows) - Undo last cursor operation

Web applications

Chromebook and Chrome OS - View page source

Facebook (Chrome) - Go to other messages

FastMail - Underline

Gmail - Underline

Joomla - Toggles underlining of selected text

TinyMCE - Underline

WordPress - Underline

Yahoo Mail - Underline

File manager

FileZilla - Preserve timestamps of transferred files

Mp3tag - Unselect all

PuTTY - Clear the line before the cursor position. If you are at the end of the line, clears the entire line

Total Commander - Swap left and right view

WhereIsIt? - View user list

WinSCP - Keep remote directory up to date

Media player

AIMP - Add URL

foobar2000 - Add location

GOM Player - Open URL

iTunes 11 for Windows - Stream audio file at a specific URL to iTunes

KMPlayer - Open URL

Windows Media Player 11 - Specify either a URL or path of a file

Games

Assetto Corsa - Cycle virtual desktops

Black Desert Online - Toggle Free Cam

Black Desert Online - Screenshot mode

FlightGear - Add 1000 ft. to your altitude (emergency)

PlayerUnknown's Battlegrounds - Toggle UI

Social & Messaging

Cisco Jabber - Underlined

Claws Mail - Show message source

Claws Mail - Delete line

Discord - Toggle channel member list

eM Client - Underline selected text

Google Hangouts - Underline

NewsBin Pro - Unlock poster

Pidgin - Plugins

Slack - Upload a file

Zimbra Web Client - Underlined

Security

Comodo IceDragon - Page Source

Productivity

Ableton Live 10 - Quantize

Ableton Live 10 - Quantize

ActivePresenter 7 - Underline

ActivePresenter 7 - Underline

Confluence - Underline

draw.io - Toggle underline on selected text

Evernote for Windows - Underline

Google Sheets - Underline

Google Sheets (Android) - Underline

Guitar Pro - Brush upstroke

Lacerte - E-file Wizard

Lacerte - Underline selected text

LibreOffice - The Underlined attribute is applied to the selected area. If the cursor is positioned in a word, this word is also underlined

LibreOffice - Refreshes the selected theme

Microsoft Excel 2016 - Underline text or remove underline

Microsoft Excel 2016 - Applies or removes underlining

Microsoft PowerPoint (Creating presentations) - Apply an underline

Microsoft PowerPoint (Slideshows) - Hide the pointer and navigation button in 15 seconds

Microsoft Sticky Notes - Underlined

Nimbus Note - Underline

Oracle EBS Forms - Update record

Outlook 2016 and Outlook 2013 - Mark as unread

Outlook 2016 and Outlook 2013 - Underline

QuickBooks Desktop - Use the item from the list that you have just opened using Ctrl + L.

SharePoint - Apply or remove the underline from the selected text.

SimpleMind - Toggle Underline font effect for selected topics or labels

The Bat! - Mark as unread

The Bat! - Underline

WPS Office - Applies or removes underlining

Scientific

KiCad 5.0.2 - Switch Units

Maple - Underline (text or Maple input)

Maple - Undo Changes to the Line

Tekla Structures 20 - Update

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