Loop...

`Ctrl` + `Alt` + `L`

All hotkeys for Pro Tools (Windows)

File Menu New session...	`Ctrl` + `N`
File Menu Open session...	`Ctrl` + `O`
File Menu Open recent	`Ctrl` + `Shift` + `O`
File Menu Close session	`Ctrl` + `Shift` + `W`
File Menu Save	`Ctrl` + `S`
File Menu Bounce to - Disk...	`Ctrl` + `Alt` + `B`
File Menu Import - Session data...	`Alt` + `Shift` + `I`
File Menu Import - Audio...	`Ctrl` + `Shift` + `I`
File Menu Import - MIDI...	`Ctrl` + `Alt` + `I`
File Menu Import - Video...	`Ctrl` + `Alt` + `Shift` + `I`
File Menu Print score...	`Ctrl` + `P`
File Menu Exit	`Ctrl` + `Q`
Edit Menu Undo	`Ctrl` + `Z`
Edit Menu Redo	`Ctrl` + `Shift` + `Z`
Edit Menu Restore last selection	`Ctrl` + `Alt` + `Z`
Edit Menu Cut	`Ctrl` + `X`
Edit Menu Copy	`Ctrl` + `C`
Edit Menu Paste	`Ctrl` + `V`
Edit Menu Clear	`Ctrl` + `B`
Edit Menu Cut special - Cut clip gain	`Start` + `Shift` + `X`
Edit Menu Copy special - Copy clip gain	`Start` + `Shift` + `C`
Edit Menu Paste special - Merge	`Alt` + `M`
Edit Menu Paste special - Repeat to fill selection	`Ctrl` + `Alt` + `V`
Edit Menu Paste special - To current automation type	`Ctrl` + `Start` + `V`
Edit Menu Clear special - Clear clip gain	`Start` + `Shift` + `B`
Edit Menu Select all	`Ctrl` + `A`
Edit Menu Selection - Change timeline to match edit	`Alt` + `Shift` + `5`
Edit Menu Selection - Change edit to match timeline	`Alt` + `Shift` + `6`
Edit Menu Selection - Play edit	`Alt` + `[`
Edit Menu Selection - Play timeline	`Alt` + `]`
Edit Menu Duplicate	`Ctrl` + `D`
Edit Menu Repeat...	`Alt` + `R`
Edit Menu Shift...	`Alt` + `H`
Edit Menu Insert silence	`Ctrl` + `Shift` + `E`
Edit Menu Trim clip - To selection	`Ctrl` + `T`
Edit Menu Trim clip - Start to selection	`Alt` + `Shift` + `7`
Edit Menu Trim clip - End to selection	`Alt` + `Shift` + `8`
Edit Menu Separate clip - At selection	`Ctrl` + `E`
Edit Menu Heal separation	`Ctrl` + `H`
Edit Menu Consolidate clip	`Alt` + `Shift` + `3`
Edit Menu Mute clips	`Ctrl` + `M`
Edit Menu Strip silence	`Ctrl` + `U`
Edit Menu TCE edit to timeline selection	`Alt` + `Shift` + `U`
Edit Menu Automation - Copy to send...	`Ctrl` + `Alt` + `H`
Edit Menu Automation - Thin	`Ctrl` + `Alt` + `T`
Edit Menu Automation - Write to current	`Ctrl` + `/`
Edit Menu Automation - Write to all enabled	`Ctrl` + `Alt` + `/`
Edit Menu Automation - Trim to current	`Ctrl` + `Shift` + `/`
Edit Menu Automation - Trim to all enabled	`Ctrl` + `Alt` + `Shift` + `/`
Edit Menu Automation - Glide to current	`Alt` + `/`
Edit Menu Automation - Glide to all enabled	`Alt` + `Shift` + `/`
Edit Menu Fades - Create...	`Ctrl` + `F`
Edit Menu Fades - Fade to start	`Alt` + `D`
Edit Menu Fades - Fade to end	`Alt` + `G`
View Menu Narrow mix	`Ctrl` + `Alt` + `M`
Track Menu New...	`Ctrl` + `Shift` + `N`
Track Menu Group...	`Ctrl` + `G`
Track Menu Duplicate...	`Alt` + `Shift` + `D`
Track Menu Set record tracks to input only	`Alt` + `K`
Track Menu Scroll to track...	`Ctrl` + `Alt` + `F`
Track Menu Clear all clip indicators	`Alt` + `C`
Clip Menu Edit lock/unlock	`Ctrl` + `L`
Clip Menu Time lock/unlock	`Alt` + `Start` + `L`
Clip Menu Send to back	`Alt` + `Shift` + `B`
Clip Menu Bring to front	`Alt` + `Shift` + `F`
Clip Menu Rating - None	`Ctrl` + `Alt` + `Start` + `NumPad` `0`
Clip Menu Rating - 1..5	`Ctrl` + `Alt` + `Start` + `NumPad` `1` .. `5`
Clip Menu Group	`Ctrl` + `Alt` + `G`
Clip Menu Ungroup	`Ctrl` + `Alt` + `U`
Clip Menu Regroup	`Ctrl` + `Alt` + `R`
Clip Menu Loop...	`Ctrl` + `Alt` + `L`
Clip Menu Capture...	`Ctrl` + `R`
Clip Menu Rename...	`Ctrl` + `Alt` + `Shift` + `R`
Clip Menu Identify/Remove sync point	`Ctrl` + `,`
Clip Menu Quantize to grid	`Ctrl` + `0` (zero)
Clip Menu Elastic properties	`Alt` + `NumPad` `5`
Event Menu Time operations - Time operations window	`Alt` + `NumPad` `1`
Event Menu Tempo operations - Tempo operations window	`Alt` + `NumPad` `2`
Event Menu Event operations - Event operations window	`Alt` + `NumPad` `3`
Event Menu Event operations - Quantize...	`Alt` + `0` (zero)
Event Menu Event operations - Change duration...	`Alt` + `P`
Event Menu Event operations - Transpose...	`Alt` + `T`
Event Menu Event operations - Select/split notes...	`Alt` + `Y`
Event Menu MIDI real-time properties	`Alt` + `NumPad` `4`
Event Menu Beat detective	`Ctrl` + `NumPad` `8`
Event Menu Identify beat...	`Ctrl` + `I`
Event Menu All MIDI notes off	`Ctrl` + `Shift` + `.`
Options Menu Loop record	`Alt` + `L`
Options Menu QuickPunch	`Ctrl` + `Shift` + `P`
Options Menu TrackPunch	`Ctrl` + `Shift` + `T`
Options Menu Transport online	`Ctrl` + `J`
Options Menu Video track online	`Ctrl` + `Shift` + `J`
Options Menu Pre/post-roll	`Ctrl` + `K`
Options Menu Loop playback	`Ctrl` + `Shift` + `L`
Options Menu Dynamic transport	`Ctrl` + `Start` + `P`
Options Menu Link timeline and edit selection	`Shift` + `/`
Options Menu Auto-spot clips	`Ctrl` + `Alt` + `P`
Options Menu Edit/Tool mode keyboard lock	`Start` + `Shift` + `T`
Setup Menu Session	`Ctrl` + `NumPad` `2`
Window Menu Configurations - Window configuration list	`Ctrl` + `Alt` + `J`
Window Menu Hide all floating windows	`Ctrl` + `Alt` + `Start` + `W`
Window Menu Close window	`Ctrl` + `W`
Window Menu Mix	`Ctrl` + `=`
Window Menu MIDI editor	`Start` + `=`
Window Menu Score editor	`Alt` + `Start` + `=`
Window Menu MIDI event list	`Alt` + `=`
Window Menu MIDI editors - Bring to front	`Alt` + `N`
Window Menu MIDI editors - Send to back	`Alt` + `Shift` + `N`
Window Menu Task manager	`Alt` + `'`
Window Menu Workspace	`Alt` + `;`
Window Menu Project	`Alt` + `O`
Window Menu Browsers - Bring to front	`Alt` + `J`
Window Menu Browsers - Send to back	`Alt` + `Shift` + `J`
Window Menu Transport	`Ctrl` + `NumPad` `1`
Window Menu Big counter	`Ctrl` + `NumPad` `3`
Window Menu Automation	`Ctrl` + `NumPad` `4`
Window Menu Memory locations	`Ctrl` + `NumPad` `5`
Window Menu Video universe	`Ctrl` + `NumPad` `7`
Window Menu Video	`Ctrl` + `NumPad` `9`
Misc. Half-speed playback	`Shift` + `Space`
Misc. Half-speed record	`Ctrl` + `Shift` + `Space` , `Shift` + `F12`
Numeric Keypad Shortcuts Play/Stop	`NumPad` `0`
Numeric Keypad Shortcuts Rewind	`NumPad` `1`
Numeric Keypad Shortcuts Fast-Forward	`NumPad` `2`
Numeric Keypad Shortcuts Record	`NumPad` `3`
Numeric Keypad Shortcuts Loop Playback toggle	`NumPad` `4`
Numeric Keypad Shortcuts Loop Record toggle	`NumPad` `5`
Numeric Keypad Shortcuts Quick Punch toggle	`NumPad` `6`
Numeric Keypad Shortcuts Metronome toggle	`NumPad` `7`
Numeric Keypad Shortcuts Countoff toggle	`NumPad` `8`
Numeric Keypad Shortcuts MIDI Merge	`NumPad` `9`
Numeric Keypad Shortcuts Add Memory Location	`NumPad` `Enter`
Numeric Keypad Shortcuts Main Counter Select	`NumPad` `*`
Numeric Keypad Shortcuts Selection Counter Select	`NumPad` `/`
Numeric Keypad Shortcuts Nudge Forward	`NumPad` `+`
Numeric Keypad Shortcuts Nudge Backward	`NumPad` `-`
Numeric Keypad Shortcuts Transport	`Ctrl` `NumPad` `1`
Numeric Keypad Shortcuts Session Setup	`Ctrl` `NumPad` `2`
Numeric Keypad Shortcuts Main Counter	`Ctrl` `NumPad` `3`
Numeric Keypad Shortcuts Automation Enable	`Ctrl` `NumPad` `4`
Numeric Keypad Shortcuts Memory Locations	`Ctrl` `NumPad` `5`
Numeric Keypad Shortcuts Machine Track Arming	`Ctrl` `NumPad` `6`
Numeric Keypad Shortcuts Video Universe	`Ctrl` `NumPad` `7`
Numeric Keypad Shortcuts Beat Detective	`Ctrl` `NumPad` `8`
Numeric Keypad Shortcuts Video	`Ctrl` `NumPad` `9`
Numeric Keypad Shortcuts Quantize (in Event Operations window)	`Alt` `NumPad` `0`
Numeric Keypad Shortcuts Time Operations	`Alt` `NumPad` `1`
Numeric Keypad Shortcuts Tempo Operations	`Alt` `NumPad` `2`
Numeric Keypad Shortcuts Event Operations	`Alt` `NumPad` `3`
Numeric Keypad Shortcuts Real-Time Properties	`Alt` `NumPad` `4`
Numeric Keypad Shortcuts Elastic Properties	`Alt` `NumPad` `5`
Numeric Keypad Shortcuts Link Timeline and Edit Selection	`Shift` `NumPad` `/`
Numeric Keypad Shortcuts Recall Memory Location	`NumPad` `.` `(Number)` `.`
Numeric Keypad Shortcuts Add Windows Configuration	`NumPad` `.` `+`
Numeric Keypad Shortcuts Add Windows Configuration (specific number)	`NumPad` `.` `(Number)` `+`
Numeric Keypad Shortcuts Recall Windows Configuration	`NumPad` `.` `(Number)` `*`