ALT

Use Alt (left side) for system-level shortcuts, menu navigation, and application functions 

(e.g.,  to close, to switch windows). 

Use AltGr (right side) to access third characters on keys, such as special symbols, currency signs (€, £), or accented letters (e.g., 

When to Use Alt (Left Alt)

The Alt (Alternate) key is primarily a functional modifier used to change the behavior of other keys, often targeting the operating system or active application. 

IONOS UK +1

• Menu Navigation: Press 

•  to highlight menus in applications.

• Application Shortcuts: Common examples include 

•  (close), 

•  (switch applications).

• System Commands: 

•  for security/task options. 

When to Use AltGr (Right Alt)

The AltGr (Alternative Graphic) key is used for inputting, allowing you to access the third symbol printed on the bottom right of a keycap, or a fourth symbol when combined with Shift. 

Wikipedia +1

• Special Characters: Used for characters like @, €, ©, ™, or ®.

• Accented Letters: Used for language-specific characters in non-US layouts.

• Alternative: If your keyboard lacks a dedicated AltGr key, you can often use 

•  as a substitute. 

Key Differences

Feature 

Alt (Left)

AltGr (Right)

Primary Use

Functions & Shortcuts

Character Input

Commonly used for

Behavior

Modifies key behavior

Accesses 3rd/4th symbols

Note: On many US keyboards, the right Alt key acts as a standard Alt key rather than AltGr

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Key combination Special character Explanation

[Alt] + [Ctrl] + [Q] @ At sign

[Alt] + [Ctrl] + [<] l Vertical line

[Alt] + [Ctrl] + [T] ™ Trademark sign

[Alt] + [Ctrl] + [C] © Copyright sign

[Alt] + [Ctrl] + [R] ® Registered sign