In a Windows PC, Ctrl+Y in Microsoft PowerPoint is the shortcut for:

1. ✅Ctrl + Y (or Ctrl + Shift + Z in some applications)
   This shortcut reverses the last undo, restoring the previously undone action. Commonly used in:
   • Microsoft Office Suite
   • Google Docs / Sheets / Slides
   • Design software like Photoshop, Illustrator.
2. ✅CTRL + I is a keyboard shortcut used to italicize the selected text in most applications like:

• Microsoft Word
• Google Docs
• PowerPoint
• Excel (for cell text)Web browsers (e.g., Gmail, Outlook web)
• 
  

✅ CTRL + T used 

1.   In Web Browsers  Opens a new tab
2.  in Microsoft Word  Opens the Font dialog box (for advanced text settings)
3.  in PowerPoint  Opens Font dialog box (like in Word)

Some Others Shortcut Keys: 

1. ✅Ctrl + U Shortcut key to  underline the selected text
2. ✅Ctrl+K is a keyboard shortcut used in many applications, primarily for inserting or editing hyperlinks.
3. ✅Ctrl+Shift+Up Arrow selects the text from the current cursor position up to the beginning of the current paragraph.
4. ✅Ctrl + L: This combination aligns the selected text or paragraph to the left margin. 
5. ✅Ctrl+Shift+Left Arrow is a keyboard shortcut that extends the text selection to the left, specifically by one word at a time
6. ✅Alt + Ctrl + Left Arrow typically rotates the display 90 degrees to the left.
7. ✅Shift key + Use mouse shortcut key to select text in MS Word   
8. ✅Ctrl + Shift + D Shortcut key to double underline the selected text  
9. ✅Alt+L to quickly focus on the address bar, enabling you to enter a new website or search term efficiently. 
10.  ✅Ctrl+Z shortcut key is used to Undo the last action in a document .
11. ✅Ctrl + R: This shortcut aligns text to the right. 
12. ✅Ctrl+N :Shortcut key for blank Presentation in MS PowerPoint
13. ✅Ctrl + J: This shortcut justifies the text, aligning it evenly on both left and right margins. 
14. ✅Ctrl + V is a keyboard shortcut used to paste content that has been previously copied or cut.
15. ✅Ctrl + Y (or Cmd + Y on Mac) shortcut key is used to Redo the last action in a document .
16. ✅Ctrl + E: This shortcut centers the text. 
17. ✅100 times undo level can be used in a worksheet
18. ✅ Ctrl+5 shortcut key are used to strike through highlighted selection in excel 
19. ✅ Ctrl+5 shortcut key are used to Word / WordPadSets 1.5 line spacing
20. ✅HIGHLIGHT Shortcut Key For PowerPoint : Ctrl + Alt + H,For Word Same as PowerPoint: Ctrl + Alt + H,For Excel Alt + H + H (Fill cell color)

🌐 In Web Browsers (Chrome, Firefox, Edge, etc.):

✅ Ctrl + T → Opens a new browser tab

📝 In Microsoft Word:

✅ Ctrl + T → Creates a hanging indent.