Command (Mac) ![](/lib/exe/fetch.php?tok=a41da1&media=https%3A%2F%2Fdeveloper.apple.com%2Flibrary%2Fmac%2Fdocumentation%2FUserExperience%2FConceptual%2FOSXHIGuidelines%2FArt%2Fks_command_2x.png) | Is the main modifier. | PageDown Scrolls down - STRG+PageDown Next Tab |
Option (Mac) ![](/lib/exe/fetch.php?tok=f9358d&media=https%3A%2F%2Fdeveloper.apple.com%2Flibrary%2Fmac%2Fdocumentation%2FUserExperience%2FConceptual%2FOSXHIGuidelines%2FArt%2Fks_option_2x.png) | Is the main modifier. | PageDown Scrolls down - STRG+PageDown Next Tab |
Ctrl | often execute tasks within a program. | |
Alt | often focuses to context menus | |
Win | often focuses or sends commands to Windows components | |
Shift | Modifier which should inverse a command. | STRG+A Select All - Shift+STRG+A Deselect All |
Fn keys | does not follow a paradigm | |
Keystrokes with multiple modifiers | does not follow a paradigm |