OS X - Adjust the volume in 1/4 increments with shift+alt+volume keys.
/via GDmac

OS X - Adjust the volume in 1/4 increments with shift+alt+volume keys.

/via GDmac

Tumblr - Press alt+tab in your dashboard to switch between sub-blogs.
/via Katharina

Tumblr - Press alt+tab in your dashboard to switch between sub-blogs.

/via Katharina

iOS 6 - Keyboard detects specifics of language and displays correct diacritics depending on the part of a word.
/via beny

iOS 6 - Keyboard detects specifics of language and displays correct diacritics depending on the part of a word.

/via beny

Asana - Holding the tab button underlines the first letter of each possible detail to indicate the keyboard shortcuts.
/via Nassar Hayat

Asana - Holding the tab button underlines the first letter of each possible detail to indicate the keyboard shortcuts.

/via Nassar Hayat

Gmail - Typing ? in Gmail (when not in a input field) gives you a cheat sheet of all available key commands.
/via gleuch

Gmail - Typing ? in Gmail (when not in a input field) gives you a cheat sheet of all available key commands.

/via gleuch

iOS - Lower corner radius changes when keyboard pops up.

iOS - Lower corner radius changes when keyboard pops up.

iPad Keyboard - There are phantom keys in the middle when you split the keyboard in half.
/via Reinier Ladan
Read more here.

iPad Keyboard - There are phantom keys in the middle when you split the keyboard in half.

/via Reinier Ladan

Read more here.

iPhone - The Siri button gets the same functionality as the space button while typing quickly.
Read more here 
/via Peter Robinet

iPhone - The Siri button gets the same functionality as the space button while typing quickly.

Read more here 

/via Peter Robinet

Mac OS X - Pressing Alt ⌥ and clicking the volume icon lets you select input and output device.
/via jage

Mac OS X - Pressing Alt ⌥ and clicking the volume icon lets you select input and output device.

/via jage

Alfred - Highlights the keyboard-shortcut when you disable all other GUI to access the preferences.
/via Hans Petter Eikemo 

Alfred - Highlights the keyboard-shortcut when you disable all other GUI to access the preferences.

/via Hans Petter Eikemo