Copy line down

`Ctrl` + `Alt` + `↓`

All hotkeys for Qt Creator

General Open file or project	`Ctrl` + `O`
General New file or project	`Ctrl` + `N`
General Open in external editor	`Alt` + `V` then `Alt` + `I`
Editing Select all	`Ctrl` + `A`
General Delete	`Del`
General Cut	`Ctrl` + `X`
General Copy	`Ctrl` + `C`
General Paste	`Ctrl` + `V`
General Redo	`Ctrl` + `Y`
General Print	`Ctrl` + `P`
Help Activate search in Help mode	`Ctrl` + `S`
General Save all	`Ctrl` + `↑ Shift` + `S`
General Close window	`Ctrl` + `W`
General Close all	`Ctrl` + `↑ Shift` + `W`
General Close current file	`Ctrl` + `F4`
General Go back	`Alt` + `←`
General Go forward	`Alt` + `→`
Editing Lay out vertically	`Ctrl` + `L`
General Next open document in history	`Ctrl` + `↑ Shift` + `⭾ Tab`
General Go to other split	`Ctrl` + `E` then `O`
General Previous open document in history	`Ctrl` + `⭾ Tab`
General Activate Locator	`Ctrl` + `K`
General Switch to Welcome mode	`Ctrl` + `1`
General Switch to Edit mode	`Ctrl` + `2`
General Switch to Design mode	`Ctrl` + `3`
General Switch to Debug mode	`Ctrl` + `4`
General Switch to Projects mode	`Ctrl` + `5`
General Switch to Help mode	`Ctrl` + `6`
General Toggle Issues pane	`Alt` + `1`
General Toggle Search Results pane	`Alt` + `2`
General Toggle Application Output pane	`Alt` + `3`
General Toggle Compile Output pane	`Alt` + `4`
General Toggle other output panes	`Alt` + `Num 0` - `Num 9`
General Activate Bookmarks pane	`Alt` + `M`
General Activate File System pane	`Alt` + `Y`
General Activate Open Documents pane	`Alt` + `O`
General Maximize output panes	`Alt` + `9`
General Move to next item in output panes	`F6`
General Move to previous item in output panes	`↑ Shift` + `F6`
General Activate Projects pane	`Alt` + `X`
General Full screen	`Ctrl` + `↑ Shift` + `F11`
General Toggle the sidebar	`Alt` + `0`
General Undo	`Ctrl` + `Z`
General Move to Edit mode. First press moves focus to the editor. Second press closes secondary windows	`Esc`
General Exit Qt Creator	`Ctrl` + `Q`
Help Activate index in Help mode	`Ctrl` + `I`
Editing Collapse	`Ctrl` + `<`
Editing Expand	`Ctrl` + `>`
Editing Trigger a completion in this scope	`Ctrl` + `Space`
Editing Copy line	`Ctrl` + `Insert`
Editing Copy line down	`Ctrl` + `Alt` + `↓`
Editing Copy line up	`Ctrl` + `Alt` + `↑`
Editing Paste from the clipboard history (Subsequent presses move you back in the history)	`Ctrl` + `↑ Shift` + `V`
Editing Cut line	`↑ Shift` + `Del`
Editing Adjust size	`Ctrl` + `J`
Editing Insert line above current line	`Ctrl` + `↑ Shift` + `⤶ Enter`
Editing Insert line below current line	`Ctrl` + `⤶ Enter`
Editing Decrease font size	`Ctrl` + `Mouse wheel down`
Editing Increase font size	`Ctrl` + `Mouse wheel up`
Help Reset font size	`Ctrl` + `0`
Editing Toggle Vim-style editing	`Alt` + `V` then `Alt` + `V`
Editing Split	`Ctrl` + `E` then `2`
Editing Split side by side	`Ctrl` + `E` then `3`
Editing Remove all splits	`Ctrl` + `E` then `1`
Editing Remove current split	`Ctrl` + `E` then `0`
Image Viewer Switch to outline	`Ctrl` + `]`
Image Viewer Switch to background	`Ctrl` + `[`
Editing Go to block end and select the lines between the current cursor position and the end of the block	`Ctrl` + `↑ Shift` + `]`
Editing Go to block start and select the lines between the current cursor position and the beginning of the block	`Ctrl` + `↑ Shift` + `[`
Editing Select the current block (The second press extends the selection to the parent block. To enable this behavior, select Tools> Options > Text Editor > Behavior > Enable smart selection changing)	`Ctrl` + `U`
Editing Undo the latest smart block selection	`Ctrl` + `Alt` + `↑ Shift` + `U`
Editing Move current line down	`Ctrl` + `↑ Shift` + `↓`
Editing Move current line up	`Ctrl` + `↑ Shift` + `↑`
Editing Trigger a refactoring action in this scope	`Alt` + `⤶ Enter`
Editing Rewrap paragraph	`Ctrl` + `E` then `R`
Editing Enable text wrapping	`Ctrl` + `E` then `Ctrl` + `W`
Editing Toggle comment for selection	`Ctrl` + `/`
Editing Visualize whitespace	`Ctrl` + `E` then `Ctrl` + `V`
Editing Lay out in a grid	`Ctrl` + `G`
Editing Lay out horizontally	`Ctrl` + `H`
Editing Preview	`Alt` + `↑ Shift` + `R`
Qt Quick Designer Move between Text Editor and Form Editor	`F4`
Help Add bookmark in Help mode	`Ctrl` + `M`
Editing Go to next bookmark	`Ctrl` + `.`
Editing to previous bookmark	`Ctrl` + then `Go`
Editing Fetch snippet	`Alt` + `C` then `Alt` + `F`
Editing Paste snippet	`Alt` + `C` then `Alt` + `P`
Editing Find usages	`Ctrl` + `↑ Shift` + `U`
Qt Quick Designer Open the QML file that defines the selected component	`F2`
Editing Rename symbol under cursor	`Ctrl` + `↑ Shift` + `R`
Editing Switch between function declaration and definition	`↑ Shift` + `F2`
Editing Open type hierarchy	`Ctrl` + `↑ Shift` + `T`
Editing Turn selected text into lowercase	`Alt` + `U`
Editing Turn selected text into uppercase	`Alt` + `↑ Shift` + `U`
Editing Run static checks on JavaScript code to find common problems	`Ctrl` + `↑ Shift` + `C`
Editing Find and replace	`Ctrl` + `F`
Editing Find next	`F3`
Editing Find previous	`↑ Shift` + `F3`
Editing Find next occurrence of selected text	`Ctrl` + `F3`
Editing Find previous occurrence of selected text	`Ctrl` + `↑ Shift` + `F3`
Image Viewer Fit to screen	`Ctrl` + `=`
Editing Open advanced find	`Ctrl` + `↑ Shift` + `F`
Editing Record a text-editing macro	`Alt` + `(`
Editing Stop recording a macro	`Alt` + `)`
Editing Play last macro	`Alt` + `R`
Editing Show Qt Quick toolbars	`Ctrl` + `Alt` + `Space`
Editing (use the number of the user action) Execute user actions in FakeVim mode	`Alt` + `V` then `1` - `9`
Image Viewer in	`Ctrl` + + `Zoom`
Image Viewer Zoom out	`Ctrl` + +
Qt Quick Designer Toggle left sidebar	`Ctrl` + `Alt` + `0`
Qt Quick Designer Toggle right sidebar	`Ctrl` + `Alt` + `↑ Shift` + `0`
Debugging Start or continue debugging	`F5`
Debugging Exit debugger	`↑ Shift` + `F5`
Debugging Step over	`F10`
Debugging Step into	`F11`
Debugging Step out	`↑ Shift` + `F11`
Debugging Toggle breakpoint	`F9`
Debugging Run to selected function	`Ctrl` + `F6`
Debugging Run to line	`Ctrl` + `F10`
Debugging Reverse direction	`F12`
Project Build project	`Ctrl` + `B`
Project Build all	`Ctrl` + `↑ Shift` + `B`
Project New project	`Ctrl` + `↑ Shift` + `N`
Project Open project	`Ctrl` + `↑ Shift` + `O`
Help Activate contents in Help mode	`Ctrl` + `T`
Project Run	`Ctrl` + `R`
Help View context-sensitive help	`F1`
Version control - Bazaar Add	`Alt` + `Z` then `Alt` + `C`
Version control - Bazaar Commit/Submit	`Alt` + `Z` then `Alt` + `D`
Version control - Bazaar Blame/Annotate	`Alt` + `Z` then `Alt` + `L`
Version control - Bazaar Log project	`Alt` + `Z` then `Alt` + `S`
Version control - CVS Add	`Alt` + `C` then `Alt` + `A`
Version control - CVS Commit/Submit	`Alt` + `C` then `Alt` + `C`
Version control - CVS Diff	`Alt` + `C` then `Alt` + `D`
Version control - Git Add	`Alt` + `G` then `Alt` + `A`
Version control - Mercurial Add	`Alt` + `G` then `Alt` + `C`
Version control - Mercurial Commit/Submit	`Alt` + `G` then `Alt` + `D`
Version control - Git Diff project	`Alt` + `G` then `Alt` + `↑ Shift` + `D`
Version control - Git Blame/Annotate	`Alt` + `G` then `Alt` + `B`
Version control - Mercurial Blame/Annotate	`Alt` + `G` then `Alt` + `L`
Version control - Git Log project	`Alt` + `G` then `Alt` + `K`
Version control - Git Undo changes/Revert	`Alt` + `G` then `Alt` + `U`
Version control - Mercurial Log project	`Alt` + `G` then `Alt` + `S`
Version control - Perforce Add	`Alt` + `P` then `Alt` + `A`
Version control - Perforce Commit/Submit	`Alt` + `P` then `Alt` + `S`
Version control - Perforce Diff project	`Alt` + `P` then `Alt` + `D`
Version control - Perforce Log/Filelog	`Alt` + `P` then `Alt` + `F`
Version control - Perforce Undo changes/Revert	`Alt` + `P` then `Alt` + `R`
Version control - Perforce Edit	`Alt` + `P` then `Alt` + `E`
Version control - Perforce Opened	`Alt` + `P` then `Alt` + `O`
Version control - Subversion Add	`Alt` + `S` then `Alt` + `A`
Version control - Subversion Commit/Submit	`Alt` + `S` then `Alt` + `C`
Version control - Subversion Diff	`Alt` + `S` then `Alt` + `D`