What is Ctrl + Shift + Page Up keyboard shortcut for?

Firefox - Move tab in focus left  

Firefox (macOS) - Move Tab Left  

Vivaldi - Move active tab left  

Adobe Acrobat 2017 (Windows and Unix) - First page  

Bluefish - First document  

Notepad2 - Select previous block  

Nuance Power PDF - Read previous page  

Harmony 20 - Bring to front  

Inkscape - Raise thelayer  

Modo 12.1 - Open next tab  

Shotcut - Backward 10 Seconds  

Everything - Extend item selection, keeping the current selection  

Terminator - Swap tab position with previous Tab  

Tilda - Move tab left  

Windows Terminal - Scroll up a page  

ZOC 7.23 - Transfer > Send text file  

Delphi - Selects from the cursor position to the top of the screen  

Free Pascal IDE - Extend selection to the beginning of the file  

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

PyCharm 2018.2 - Move the caret up to the page bottom, selecting the text.  

SQL Server Management Studio (SSMS) - Extend the selection to the top of the current window  

SQL Server Management Studio (SSMS) - Moves the cursor to the first line in view, extending the selection  

Visual Studio Code (Linux) - Move editor left  

Visual Studio Code (Windows) - Move editor left  

Microsoft Flight Simulator 2020 - Increase Nav1 Frequency  

Edius Pro 9 - Scroll Up  

Google Sheets - Move to previous sheet  

LibreOffice Calc - Adds the previous sheet to the current selection of sheets. If all the sheets in a spreadsheet are selected, this shortcut key combination only selects the previous sheet. Makes the previous sheet the current sheet  

Microsoft Excel 2019 - Select the current and previous sheet in a workbook  

Microsoft Excel 2019 - Selects the current and previous sheet in a workbook  

Rhino 6 - TiltView left  

Rhino 6 - TiltView > Left