What is Alt + ↑  Shift + ↓ keyboard shortcut for?

Audacity - Decrease gain on focused track  

Lubuntu (Openbox) - Sent to desktop  

Hacklily - Copy Line Down  

Microsoft Word 2019 - Move selected paragraphs down  

Microsoft Word 2019 - Row down  

Microsoft OneNote - Move the current paragraph or several selected paragraphs down  

Microsoft OneNote - Move the selected page tab down  

Sublime Text - Column selection down  

Brackets - Decrement Number  

Brackets - Decrement Number  

Brackets - Add cursor to next line  

Micro 2.0.13 (text editor) - Spawn multi cursor down  

Ace Editor - Copy lines down  

Adobe Premiere Pro (Windows) - Decrease Leading by Five Units  

Nuke - Go to min version  

Affinity Photo - Lower Baseline  

DesignSpark Mechanical 5.0 - Nudge primary (active) dimension Down by small amount  

Penpot (Windows) - Decrease line height  

JAWS - (when the JAWS Cursor is active) Mouse Down  

JAWS - (when the JAWS Cursor is active) Mouse Down  

Delphi - Moves the cursor down one line and selects the column from the left of the starting cursor position  

Eclipse - Reduce previously expanded selection by one step  

Microsoft Visual Studio 2017 (All shortcuts) - Arrow  Graphics.MovePixelSelectionDown  

Microsoft Visual Studio 2017 (All shortcuts) - Arrow  Edit.LineDownExtendColumn  

Atom (Windows) - native!  

Aqua Data Studio 23.2 (Windows, Linux, Java) - Edit: Move Line(s) Down  

Aqua Data Studio 23.2 (Windows, Linux, Java) - Format: Cell Size Taller  

Microsoft Visual Studio 2017 (Most used shortcuts) - [Text Editor] Edit.LineDownExtendColumn  

GitLab (Windows) - Add cursor below  

Ace Editor 1.35.2 (Windows) - Copy lines down  

TradingView - Copy lines down  

Azure Portal - Move the selected left pane item down  

Signal (desktop) - Next unread conversation  

REAPER - Edit: Decrease pitch cursor one octave  

REAPER - Edit: Move pitch cursor down one octave  

Studio One 5.4 - Nudge Down Fine  

Logseq - Move block down  

Openbox - Open the desktop switching dialog, to go to the desktop below the current one, and bring the active window with you (This will only be useful if you use a pager to set up a desktop layout with multiple rows)  

Finale 26 - Change pitch: Octave down diatonically  

Excel for the web - Open a filter menu when a table cell is selected  

Edius Pro 9 - Add Focus to Down  

MuseScore 3 - Lower pitch diatonically  

Double Commander 1.1.20 - Column select down  

Archicad 24 - Nudge Down (Larger)  

Altium Designer - Extend a column selection by one line down from the current cursor position  

Desmos Graphing Calculator (Windows) - Expand all folders