Duplicate selection

`Alt` + `D`

All hotkeys for Notepad2

Editing Undo	`Ctrl` + `Z`
Editing Undo	`Alt` + `⬅ Backspace`
Editing Undo	`Ctrl` + `↑ Shift` + `Y`
Editing Redo	`Ctrl` + `↑ Shift` + `Z`
Editing Redo	`Ctrl` + `Y`
Editing Cut	`Ctrl` + `X`
Editing Cut	`↑ Shift` + `Del`
Editing Copy	`Ctrl` + `C`
Editing Copy all	`Alt` + `C`
Editing Paste	`Ctrl` + `V`
Editing Paste	`↑ Shift` + `Ins`
Editing Swap	`Ctrl` + `K`
Editing Clear	`Del`
Editing Select all	`Ctrl` + `A`
Editing Rectangular selection	`Alt` + `↑ Shift` + `← ↑ → ↓`
Editing New line with toggled auto indent option	`Ctrl` + `⤶ Enter`
Editing Goto previous block	`Ctrl` + `Page Up`
Editing Goto next block	`Ctrl` + `PgDown`
Editing Select previous block	`Ctrl` + `Shift` + `Page Up`
Editing Select next block	`Ctrl` + `Shift` + `Page Down`
Favorites Open favorites	`Alt` + `I`
Favorites Add to favorites	`Alt` + `K`
Favorites Manage favorites	`F9`
File New file	`Ctrl` + `N`
File Close file, identical with Ctrl + N	`Ctrl` + `F4`
File Open file	`Ctrl` + `O`
File Reload file	`F5`
File Reload file without encoding detection	`F8`
File Save file	`Ctrl` + `S`
File Save file as	`F6`
File Save file copy	`Ctrl` + `F6`
File Print file	`Ctrl` + `P`
File Open recent file	`Alt` + `H`
Tools Open document in new window	`Alt` + `N`
Tools Open new empty window	`Alt` + `0`
Tools Run metapath file browser plugin	`Ctrl` + `M`
Tools Launch document	`Ctrl` + `L`
Tools Open with	`Alt` + `L`
Tools Run command	`Ctrl` + `R`
Word Select word (or line)	`Ctrl` + `Space`
Word Delete word before/left	`Ctrl` + `⬅ Backspace`
Word Delete word after/right	`Ctrl` + `Del`
Line Move line up	`Ctrl` + `↑ Shift` + `↑`
Line Move line down	`Ctrl` + `↑ Shift` + `↓`
Line Duplicate line	`Ctrl` + `D`
Line Cut line	`Ctrl` + `↑ Shift` + `X`
Line Copy line	`Ctrl` + `↑ Shift` + `C`
Line Delete line	`Ctrl` + `E`
Line Delete line left	`Ctrl` + `↑ Shift` + `⬅ Backspace`
Line Delete line right	`Ctrl` + `↑ Shift` + `Del`
Block Indent selected block	`⭾ Tab`
Block Unindent selected block	`↑ Shift` + `⭾ Tab`
Block Force indentation of selected block	`Ctrl` + `⭾ Tab`
Block Force unindentation of selected block	`Ctrl` + `↑ Shift` + `⭾ Tab`
Block Duplicate selection	`Alt` + `D`
Block Strip first character	`Alt` + `Z`
Block Strip trailing blanks	`Alt` + `W`
Block Remove blank lines	`Alt` + `R`
Block Modify lines	`Alt` + `M`
Block Column wrap	`Ctrl` + `↑ Shift` + `W`
Block Split lines	`Ctrl` + `I`
Block Join lines	`Ctrl` + `J`
Brace Find matching brace	`Ctrl` + `B`
Brace Select to matching brace	`Ctrl` + `↑ Shift` + `B`
Convert Make uppercase	`Ctrl` + `↑ Shift` + `U`
Convert Make lowercase	`Ctrl` + `U`
Convert Invert case	`Ctrl` + `↑ Shift` + `E`
Convert Convert tabs to spaces	`Ctrl` + `↑ Shift` + `S`
Convert Convert spaces to tabs	`Ctrl` + `↑ Shift` + `T`
Convert Convert to ANSI	`Ctrl` + `↑ Shift` + `A`
Convert Convert to OEM	`Ctrl` + `↑ Shift` + `O`
Insert HTML/XML tag	`Alt` + `X`
Insert Time/date (short form)	`Ctrl` + `F5`
Insert Time/date (long form)	`Ctrl` + `↑ Shift` + `F5`
Insert Filename	`Ctrl` + `F9`
Insert Path and filename	`Ctrl` + `↑ Shift` + `F9`
Find and replace Find	`Ctrl` + `F`
Find and replace Save find text	`Alt` + `F3`
Find and replace Find next	`F3`
Find and replace Find previous	`↑ Shift` + `F3`
Find and replace Find next word or selection	`Ctrl` + `F3`
Find and replace Find previous word or selection	`Ctrl` + `↑ Shift` + `F3`
Find and replace Expand selection to next match	`F2`
Find and replace Expand selection to previous match	`↑ Shift` + `F2`
Find and replace Replace	`Ctrl` + `H`
Find and replace Jump to line	`Ctrl` + `G`
Syntax scheme, font Select syntax scheme	`F12`
Syntax scheme, font Select 2nd default syntax scheme	`↑ Shift` + `F12`
Syntax scheme, font Customize syntax schemes	`Ctrl` + `F12`
Syntax scheme, font Select default font	`Alt` + `F12`
Syntax scheme, font Select default text syntax scheme	`F11`
Syntax scheme, font Select web source code syntax scheme	`Ctrl` + `F11`
Syntax scheme, font Select XML document syntax scheme	`↑ Shift` + `F11`
View Toggle word wrap	`Ctrl` + `W`
View Show long line marker	`Ctrl` + `↑ Shift` + `L`
View Show indentation guides	`Ctrl` + `↑ Shift` + `G`
View Show line numbers	`Ctrl` + `↑ Shift` + `N`
View Show selection margin	`Ctrl` + `↑ Shift` + `M`
View Show whitespace	`Ctrl` + `↑ Shift` + `8`
View Show line endings	`Ctrl` + `↑ Shift` + `9`
View Show wrap symbols	`Ctrl` + `↑ Shift` + `0`
View Toggle visual brace matching	`Ctrl` + `↑ Shift` + `V`
View Highlight current line	`Ctrl` + `↑ Shift` + `I`
Zoom Zoom in	`Ctrl` + `+`
Zoom Zoom out	`Ctrl` + `-`
Zoom Reset zoom	`Ctrl` + `/`
Settings Tab settings	`Ctrl` + `T`
Settings Toggle auto close HTML/XML	`Ctrl` + `↑ Shift` + `H`
Settings Always on top	`Alt` + `T`
Settings Transparent mode	`Alt` + `U`
Settings Save settings now	`F7`
Miscellaneous Exit Notepad2	`Ctrl` + `Q`
Miscellaneous Optionally minimize or exit Notepad2	`Esc`
Miscellaneous Save file and exit Notepad2	`↑ Shift` + `Esc`
Miscellaneous Display version info	`F1`