Constrain aspect ratio when Crop tool is selected

`A`

All hotkeys for Adobe Lightroom Classic (Mac)

Working with panels Show/hide side panels	`⭾ Tab`
Working with panels Show/hide all panels	`↑ Shift` + `⭾ Tab`
Working with panels Show/hide toolbar	`T`
Working with panels Show/hide Module Picker	`F5`
Working with panels Show/hide Filmstrip	`F6`
Working with panels Show/hide left panels	`F7`
Working with panels Show/hide right panels	`F8`
Working in the Develop module (click group name) Reset a group of sliders	`⌥ Option` + `Mouse left click`
Rating and filtering photos (click filter labels) Open multiple filters in the Filter bar	`↑ Shift` + `Mouse left click`
Working in the Develop module (click Sync button) Toggle Auto Sync	`⌘ Cmd` + `Mouse left click`
Working with panels … to <keybs>5</keybs>: Open/close left panels, top to bottom	`⌘ Cmd` + `Control` + `0`
Working with panels Open/close right panels, Library and Develop modules, top to bottom	`⌘ Cmd` + `0` - `9`
Working with panels … to <keybs>7</keybs>: Open/close right panels, Slideshow, Print, and Web modules, top to bottom	`⌘ Cmd` + `1`
Navigating modules Go to Library module	`⌘ Cmd` + `⌥ Option` + `1`
Navigating modules Go to Develop module	`⌘ Cmd` + `⌥ Option` + `2`
Navigating modules Go to Slideshow module	`⌘ Cmd` + `⌥ Option` + `3`
Navigating modules Go to Print module	`⌘ Cmd` + `⌥ Option` + `4`
Navigating modules Go to Web module	`⌘ Cmd` + `⌥ Option` + `5`
Navigating modules Go back / go forward	`⌘ Cmd` + `⌥ Option` + `← →`
Navigating modules Go back to previous module	`⌘ Cmd` + `⌥ Option` + `↑`
Comparing photos in the Library module Switch from Grid to Loupe view	`E`
Comparing photos in the Library module Switch to Grid view	`G`
Comparing photos in the Library module Switch to Compare view	`C`
Comparing photos in the Library module Switch to Survey view	`N`
Changing views and screen modes Open selected photo in the Develop module	`D`
Changing views and screen modes Cycle forward / backward through Lights Out modes	`L`
Changing views and screen modes Cycle forward / backward through Lights Out modes	`↑ Shift` + `L`
Changing views and screen modes Toggle Lights Dim mode	`⌘ Cmd` + `↑ Shift` + `L`
Changing views and screen modes Cycle screen modes	`F`
Changing views and screen modes Previous screen mode	`↑ Shift` + `F`
Changing views and screen modes Switch between Normal and full-screen, hide panels	`⌘ Cmd` + `↑ Shift` + `F`
Changing views and screen modes Go to Normal screen mode	`⌘ Cmd` + `⌥ Option` + `F`
Changing views and screen modes Cycle info overlay	`I`
Changing views and screen modes Show/hide info overlay	`⌘ Cmd` + `I`
Using a secondary window Open secondary window	`⌘ Cmd` + `F11`
Using a secondary window Enter Grid view	`↑ Shift` + `G`
Using a secondary window Enter normal Loupe view	`↑ Shift` + `E`
Using a secondary window Enter locked Loupe view	`⌘ Cmd` + `↑ Shift` + `⤶ Enter`
Using a secondary window Enter Compare view	`↑ Shift` + `C`
Using a secondary window Enter Survey view	`↑ Shift` + `N`
Using a secondary window Enter Slideshow view	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `⤶ Enter`
Using a secondary window Enter full-screen mode (requires a second monitor)	`⌘ Cmd` + `↑ Shift` + `F11`
Using a secondary window Show/hide Filter bar	`↑ Shift` + `\`
Using a secondary window Zoom in / zoom out	`⌘ Cmd` + `↑ Shift` + `=`
Using a secondary window Zoom in / zoom out	`⌘ Cmd` + `↑ Shift` + `-`
Managing photos and catalogs Import photos from disk	`⌘ Cmd` + `↑ Shift` + `I`
Managing photos and catalogs Open catalog	`⌘ Cmd` + `↑ Shift` + `O`
Managing photos and catalogs Open Preferences	`⌘ Cmd` + `,`
Managing photos and catalogs Open Catalog Settings	`⌘ Cmd` + `⌥ Option` + `,`
Managing photos and catalogs Create new subfolder (segmented tethered capture)	`⌘ Cmd` + `↑ Shift` + `T`
Managing photos and catalogs Hide/show tether capture bar	`⌘ Cmd` + `T`
Working in the Web module Create a new web gallery template folder	`⌘ Cmd` + `↑ Shift` + `N`
Managing photos and catalogs Create virtual copy (Library and Develop module only)	`⌘ Cmd` + `‘`
Working in the Web module Reload web gallery	`⌘ Cmd` + `R`
Managing photos and catalogs Go to previous/next photo in the Filmstrip	`← →`
Managing photos and catalogs Rename photo (in Library module)	`F2`
Managing photos and catalogs Delete selected photo(s)	`Del`
Managing photos and catalogs Remove selected photo(s) from catalog	`⌥ Option` + `Del`
Managing photos and catalogs Delete selected photo(s) and move to Recycling Bin (Windows) or Trash (Mac OS)	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `Del`
Managing photos and catalogs Delete rejected photo(s)	`⌘ Cmd` + `Del`
Working in the Develop module Edit in Photoshop	`⌘ Cmd` + `E`
Managing photos and catalogs Open in other editor	`⌘ Cmd` + `⌥ Option` + `E`
Managing photos and catalogs Export selected photo(s)	`⌘ Cmd` + `↑ Shift` + `E`
Managing photos and catalogs Export with previous settings	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `E`
Managing photos and catalogs Open plug-in manager	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `,`
Working in the Print module Print	`⌘ Cmd` + `P`
Working in the Print module Open Page Setup dialog box	`⌘ Cmd` + `↑ Shift` + `P`
Working in the Slideshow module Play slide show	`⤶ Enter`
Working in the Slideshow module End slide show	`Esc`
Working in the Slideshow module Pause slide show	`Space`
Comparing photos in the Library module Swap select and candidate photos in Compare view	`↓`
Comparing photos in the Library module Make next photos select and candidate in Compare view	`↑`
Working in the Develop module Toggle between Loupe and 1:1 Zoom preview	`Z`
Working in the Develop module Zoom in / zoom out	`⌘ Cmd` + `=`
Working in the Develop module Zoom in / zoom out	`⌘ Cmd` + `-`
Comparing photos in the Library module Scroll up/down Grid thumbnails	`Page Up / Down`
Comparing photos in the Library module Go to beginning/end of Grid view	`Home`
Comparing photos in the Library module Go to beginning/end of Grid view	`End`
Working in the Web module Play impromptu slide show	`⌘ Cmd` + `⤶ Enter`
Working in the Print module Rotate photo right (clockwise)	`⌘ Cmd` + `]`
Working in the Print module Rotate photo left (counterclockwise)	`⌘ Cmd` + `[`
Comparing photos in the Library module Increase/decrease Grid thumbnail size	`=`
Working in the Develop module Increase/decrease selected slider in small increments	`-`
Working in the Print module Show/hide guides	`⌘ Cmd` + `↑ Shift` + `H`
Working in the Develop module Select Targeted Adjustment tool to apply a Hue adjustment	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `H`
Working in the Develop module Show clipping	`J`
Working in the Web module Export web gallery	`⌘ Cmd` + `J`
Comparing photos in the Library module Select all photos	`⌘ Cmd` + `A`
Comparing photos in the Library module Deselect all photos	`⌘ Cmd` + `D`
Comparing photos in the Library module Deselect all photos	`⌘ Cmd` + `↑ Shift` + `A`
Comparing photos in the Library module Select only active photo	`⌘ Cmd` + `↑ Shift` + `D`
Working in the Develop module Switch between local adjustment brush A and B	`/`
Comparing photos in the Library module Add previous/next photo to selection	`↑ Shift` + `←/→`
Comparing photos in the Library module Select flagged photos	`⌘ Cmd` + `⌥ Option` + `A`
Comparing photos in the Library module Deselect unflagged photos	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `D`
Comparing photos in the Library module Group into stack	`⌘ Cmd` + `G`
Comparing photos in the Library module Unstack	`⌘ Cmd` + `↑ Shift` + `G`
Comparing photos in the Library module Toggle stack	`S`
Comparing photos in the Library module Move to top of stack	`↑ Shift` + `S`
Working in the Develop module Increase/decrease brush feathering	`↑ Shift` + `[`
Working in the Develop module Increase/decrease brush feathering	`↑ Shift` + `]`
Rating and filtering photos … to <keybs>5</keybs>: Set star rating	`1`
Rating and filtering photos … to <keybs>5</keybs>: Set star rating and go to next photo	`↑ Shift` + `1`
Rating and filtering photos Remove star rating	`0`
Rating and filtering photos Remove star rating and go to next photo	`↑ Shift` + `0`
Working in the Develop module Increase/decrease brush size	`]`
Working in the Develop module Increase/decrease brush size	`[`
Rating and filtering photos Assign a red label	`6`
Rating and filtering photos Assign a yellow label	`7`
Rating and filtering photos Assign a green label	`8`
Rating and filtering photos Assign a blue label	`9`
Rating and filtering photos … to <keybs>9</keybs>: Assign a color label and go to next photo	`↑ Shift` + `6`
Rating and filtering photos Flag photo as a pick	`P`
Rating and filtering photos Flag photo as a pick and go to next photo	`↑ Shift` + `P`
Working in the Develop module Switch crop between portrait and landscape orientation	`X`
Rating and filtering photos Flag photo as a reject and go to next photo	`↑ Shift` + `X`
Rating and filtering photos Unflag photo	`U`
Rating and filtering photos Unflag photo and go to next photo	`↑ Shift` + `U`
Rating and filtering photos Increase/decrease flag status	`Ctrl` + `↑ ↓`
Rating and filtering photos Cycle flag settings	`‘`
Working in the Develop module Reset crop	`⌘ Cmd` + `⌥ Option` + `R`
Working in the Develop module View Before only	`\`
Rating and filtering photos Toggle filters on/off	`⌘ Cmd` + `L`
Rating and filtering photos Find photo in the Library module	`⌘ Cmd` + `F`
Working in the Web module Create a new web gallery template	`⌘ Cmd` + `N`
Working with collections Add to Quick Collection	`B`
Working with collections Add to Quick Collection and go to next photo	`↑ Shift` + `B`
Working with collections Show Quick Collection	`⌘ Cmd` + `B`
Working with collections Save Quick Collection	`⌘ Cmd` + `⌥ Option` + `B`
Working with collections Clear Quick Collection	`⌘ Cmd` + `↑ Shift` + `B`
Working with collections Set as target collection	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `B`
Working with collections with metadata and keywords in the Library module	`*Working`
Working with collections Add keywords	`⌘ Cmd` + `K`
Working in the Print module Show/hide image cells	`⌘ Cmd` + `↑ Shift` + `K`
Working with collections Set a keyword shortcut	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `K`
Working with collections Add/remove keyword shortcut from selected photo	`↑ Shift` + `K`
Working with collections Enable painting	`⌘ Cmd` + `⌥ Option` + `K`
Working with collections Add a keyword from a keyword set to selected photo	`⌥ Option` + `1` + `9`
Working with collections Cycle forward / backward through keyword sets	`⌥ Option` + `0`
Working with collections Cycle forward / backward through keyword sets	`⌥ Option` + `↑ Shift` + `0`
Working with collections Copy/paste metadata	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `C`
Working with collections Copy/paste metadata	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `V`
Working in the Web module Save web gallery settings	`⌘ Cmd` + `S`
Working with collections Open Spelling dialog box	`⌘ Cmd` + `:`
Working with collections Check spelling	`⌘ Cmd` + `;`
Working with collections Open Character palette	`⌘ Cmd` + `⌥ Option` + `T`
Working in the Develop module Convert to grayscale	`V`
Working in the Develop module Auto tone	`⌘ Cmd` + `U`
Working in the Print module Show/hide dimensions	`⌘ Cmd` + `↑ Shift` + `U`
Working in the Develop module Copy/paste Develop settings	`⌘ Cmd` + `↑ Shift` + `C`
Working in the Develop module Copy/paste Develop settings	`⌘ Cmd` + `↑ Shift` + `V`
Working in the Develop module Paste settings from previous photo	`⌘ Cmd` + `⌥ Option` + `V`
Working in the Develop module Copy After settings to Before	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `←`
Working in the Develop module Copy Before settings to After	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `→`
Working in the Develop module Swap Before and After settings	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `↑`
Working in the Develop module Increase/decrease selected slider in small increments	`↑ ↓`
Working in the Develop module Increase/decrease selected slider in small increments	`+`
Working in the Develop module Increase/decrease selected slider in larger increments	`↑ Shift` + `↑ ↓`
Working in the Develop module Increase/decrease selected slider in larger increments	`↑ Shift` + `+`
Working in the Develop module Increase/decrease selected slider in larger increments	`↑ Shift` + `-`
Working in the Develop module Cycle through Basic panel settings (forward/backward)	`.`
Working in the Develop module Cycle through Basic panel settings (forward/backward)	`,`
Working in the Develop module (on slider name) Reset a slider	`Mouse double click`
Working in the Develop module Reset all settings	`⌘ Cmd` + `↑ Shift` + `R`
Working in the Develop module Sync settings	`⌘ Cmd` + `↑ Shift` + `S`
Working in the Develop module Sync settings bypassing Synchronize Settings dialog box	`⌘ Cmd` + `⌥ Option` + `S`
Working in the Develop module Enable Auto Sync	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `A`
Working in the Develop module Match total exposures	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `M`
Working in the Develop module Select White Balance tool (from any module)	`W`
Working in the Develop module Select the Crop tool (from any module)	`R`
Working in the Develop module Constrain aspect ratio when Crop tool is selected	`A`
Working in the Develop module Crop to same aspect ratio as previous crop	`↑ Shift` + `A`
Working in the Develop module Crop from center of photo	`⌥ Option` + `Mouse movement`
Working in the Develop module Show/hide local adjustment mask overlay	`O`
Working in the Develop module Cycle local adjustment mask overlay colors	`↑ Shift` + `O`
Working in the Develop module Toggle Mask between Edit and Brush modes when the Graduated Filter or Radial Filter is selected	`↑ Shift` + `T`
Working in the Develop module Select the Spot Removal tool	`Q`
Working in the Develop module Select the Adjustment Brush tool (from any module)	`K`
Working in the Develop module Select the Graduated Filter tool	`M`
Working in the Develop module Temporarily switch from brush A or B to Eraser	`⌥ Option` + `Mouse movement`
Working in the Develop module Paint a horizontal or vertical line	`↑ Shift` + `Mouse movement`
Working in the Develop module Show/hide local adjustment pin	`H`
Working in the Develop module Select Targeted Adjustment tool to apply a Tone Curve adjustment	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `T`
Working in the Develop module Select Targeted Adjustment tool to apply a Saturation adjustment	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `S`
Working in the Develop module Select Targeted Adjustment tool to apply a Luminance adjustment	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `L`
Working in the Develop module Select Targeted Adjustment tool to apply a Grayscale Mix adjustment	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `G`
Working in the Develop module Deselect Targeted Adjustment tool	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `N`
Working in the Develop module View Before and After left/right	`Y`
Working in the Develop module View Before and After top/bottom	`⌥ Option` + `Y`
Working in the Develop module View Before and After in a split screen	`↑ Shift` + `Y`
Working in the Develop module Create a new preset folder	`⌘ Cmd` + `⌥ Option` + `N`
Working in the Slideshow module Preview slide show	`⌥ Option` + `⤶ Enter`
Working in the Slideshow module Go to next slide	`→`
Working in the Slideshow module Go to previous slide	`←`
Working in the Print module Show/hide page bleed	`⌘ Cmd` + `↑ Shift` + `J`
Working in the Slideshow module Export video slide show	`⌘ Cmd` + `⌥ Option` + `J`
Working in the Web module Preview in browser	`⌘ Cmd` + `⌥ Option` + `P`
Working in the Print module Open Print Settings dialog box	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `P`
Working in the Print module Go to first page	`⌘ Cmd` + `↑ Shift` + `←`
Working in the Print module Go to last page	`⌘ Cmd` + `↑ Shift` + `→`
Working in the Print module Go to previous page	`⌘ Cmd` + `←`
Working in the Print module Go to next page	`⌘ Cmd` + `→`
Working in the Print module Show/hide margins and gutters	`⌘ Cmd` + `↑ Shift` + `M`
Help Display current module shortcuts	`⌘ Cmd` + `/`
Help Hide current module shortcuts	`Mouse left click`
Help Go to current module Help	`⌘ Cmd` + `⌥ Option` + `↑ Shift` + `/`
Help Open Community Help	`F1`