Medium

General

Shortcuts help

`Ctrl` + `?`

All hotkeys for Medium

General Shortcuts help	`Ctrl` + `?`
General Bold	`Ctrl` + `B`
General Italic	`Ctrl` + `I`
General Link	`Ctrl` + `K`
General Header	`Ctrl` + `Alt` + `1`
General Sub header	`Ctrl` + `Alt` + `2`
General Quote	`Ctrl` + `Alt` + `5`
General Bulleted list	`*` then `Space`
General Numbered list	`1` then `Space`
General Seperator	`Ctrl` + `⤶ Enter`
General Code block	`Ctrl` + `Alt` + `6`
General Inline code	`
General Featured image	`Ctrl` + `Alt` + `8`
General Featured image	`↑ Shift` + `F`
General Set focal point on featured image	`Alt` + `Mouse left click`

Similar combinations for other applications

Thunderbird (Windows)

Help

Other Shortcuts

`Ctrl` + `?`

Thunderbird (Linux)

Help

Other Shortcuts

`Ctrl` + `?`

iTunes (Windows)

Open iTunes Help

Other

`Ctrl` + `?`

Apple Photos (Windows)

iPhoto Help

General

`Ctrl` + `?`

VideoPad Video Editor (Windows)

Help contents

Help

`Ctrl` + `?`

JS Bin

Show keyboard shortcuts

Application level

`Ctrl` + `?`

YouTube Studio

Show keyboard shortcuts

General

`Ctrl` + `?`

iTunes 11 for Windows

Open iTunes help

Help menu

`Ctrl` + `?`