Undo the last editing action

`Ctrl` + `Z`

All hotkeys for LDCad

Global Start a new file/model	`Ctrl` + `N`
Global Open an existing file/model from disk	`Ctrl` + `O`
Global Save the file the current model is part of	`Ctrl` + `S`
Global Save all changed LDraw files	`Ctrl` + `↑ Shift` + `S`
Global Close current file	`Ctrl` + `W`
Global Reload current file	`F5`
Global Enable/disable rendering of snap info points	`F11`
Editor 4: If the mouse is over a path point resize control spot it will resize it by one grid step	`↑ ↓`
Editor 2: While inserting/moving parts it will rotate the 'floating' parts 90 degrees around the screens depth axis	`Page Up / Down`
Editor 3: While the mouse is inside the animation panel seek to the first frame instead	`Home`
Editor 2: While the mouse is inside the animation panel it will seek the last frame instead	`End`
Editor Zoom in/out on the lookat point	`Mouse wheel up and down`
Editor 2: Deselect the selection, if any, otherwise	`Esc`
Editor 4: If the mouse is over a path point resize control spot it will resize it by one grid step	`← →`
Editor Zoom in/out on the lookat point using smaller steps	`Ctrl` + `Mouse wheel up and down`
Editor (on part) Add to or remove from selection	`Ctrl` + `Mouse left click`
Partbin (on cell) Apply to selection	`Mouse double click`
Partbin … to <keybs>6</keybs>: Switch to view	`1`
Editor Set the editing plane to front/back (XY)	`F`
Partbin Remove the current working part from your favorites	`↑ Shift` + `F`
Partbin Opens the filter dialog	`F3`
Editor Open a relevant dialog for the current selection or model	`⤶ Enter`
Editor 2: If a multiple selection is active it will replicate it like <keybs>Ctrl</keybs> + <keybs>D</keybs> does	`Insert`
Partbin Increase/decrease the number of item columns	`+`
Partbin Increase/decrease the number of item columns	`-`
Editor Set (the editing pin in) rotate mode	`R`
Partbin Scroll a couple of rows up/down	`↑ Shift` + `Mouse wheel up and down`
Partbin Rotate cell content if the cursor is currently in a cell	`Ctrl` + `Mouse movement`
Partbin Rotate cell content up/down	`Ctrl` + `Alt` + `Mouse wheel up and down`
Editor (on part) Select or deselect	`Mouse left click`
Editor (on part) Set part as the current working part without changing any of the other work variables	`↑ Shift` + `Mouse left click`
Editor Make part the selection's main item	`Ctrl` + `↑ Shift` + `Mouse left click`
Editor Duplicate the current selection	`Ctrl` + `D`
Editor Append a new building step	`Ctrl` + `Insert`
Editor Insert the last used session's model as if it were the current working part	`↑ Shift` + `Insert`
Editor Delete the selection	`Del`
Editor Reset the selection's orientation relative to the current grid orientation	`Ctrl` + `Home`
Editor Snap to all (3D) grid axis'	`↑ Shift` + `Home`
Editor Switch to the main session/model in the current LDraw file	`Ctrl` + `End`
Editor Switch to the session/model of the current selection's main item	`↑ Shift` + `End`
Editor During nested mode switches to the session/model which contains the current selection's main item	`Ctrl` + `↑ Shift` + `End`
Editor 2: While inserting/moving parts it will rotate the 'floating' parts 45 degrees around the screens depth axis	`Ctrl` + `Page Up / Down`
Editor 2: While inserting/moving parts it will rotate the 'floating' parts 45 degrees around the screens vertical axis	`Ctrl` + `← →`
Editor 2: While inserting/moving parts it will rotate the 'floating' parts 45 degrees around the screens horizontal axis	`Ctrl` + `↑ ↓`
Editor Switch between split views (if any) and a zoomed current editing view	`Space`
Editor Set the editing plane to top/bottom (XZ)	`T`
Editor Set the editing plane to sides (ZY)	`S`
Editor Change the grid orientation to match the current selection's main part. Or reset to the absolute grid if no selection is active	`O`
Editor Set (the editing pin in) move mode	`M`
Editor Open the selection move dialog	`Ctrl` + `M`
Editor Open the selection rotate dialog	`Ctrl` + `R`
Editor Go to animation mode	`A`
Editor Leave animation mode	`↑ Shift` + `A`
Editor Select all	`Ctrl` + `A`
Editor Select none	`↑ Shift` + `Ctrl` + `A`
Editor 2: Play/pause the animation while in animation mode	`P`
Editor Enable/disable part snapping	`↑ Shift` + `P`
Editor Initialize resizing of the editing pin length	`↑ Shift` + `Ctrl` + `P`
Editor Center the camera on the current selection	`C`
Editor Copy the selection's LDraw data to the clipboard. A dialog with additional options might appear if needed	`Ctrl` + `C`
Editor Move the selection to 0,0,0	`↑ Shift` + `C`
Editor Switch the camera between the perspective and orthographic projection mode	`V`
Editor Switch the camera between the perspective and orthographic projection mode while trying to retain the current view direction	`↑ Shift` + `V`
Editor Paste LDraw data from the clipboard into the model. A dialog with options might show up first if needed	`Ctrl` + `V`
Editor Zoom to fit	`Z`
Editor Undo the last editing action	`Ctrl` + `Z`
Editor Redo the last undone editing action	`↑ Shift` + `Ctrl` + `Z`
Editor Add the current selection to the nesting exclusion list	`E`
Editor Remove the current selection from the nesting exclusion list	`Ctrl` + `E`
Editor Clear the nesting exclusion list	`Ctrl` + `↑ Shift` + `E`
Editor Hide (ghost) the selection	`H`
Editor Undo the last selection hide	`Ctrl` + `H`
Editor Make all currently hidden parts visible again	`Ctrl` + `↑ Shift` + `H`
Editor Show/hide the selection's editing grid	`G`
Editor Create a new group from the current selection	`Ctrl` + `G`
Editor Remove all top level grouping from the current selection	`↑ Shift` + `Ctrl` + `G`
Editor Enable/disable looped playback for the current animation if any	`L`
Editor Show/hide the selected parts information panel	`I`
Editor Show/hide the (bottom/left) document information icon	`Ctrl` + `I`
Editor Regenerate dynamic (path/spring) parts	`Ctrl` + `F05`
Editor Cut (copy to clipboard and remove) the current selection. A dialog with extra options might first appear if needed	`Ctrl` + `X`
Editor Enter nesting mode	`N`
Editor Leave nesting mode	`↑ Shift` + `N`
Editor Choose the current move stepping	`1` - `9`
Editor Choose the current rotate stepping	`Ctrl` + `1` - `9`
Editor While on the editing or compass background it will rotate the view in perspective mode or move the view in orthographic mode	`Mouse movement`
Editor While on the editing or compass background it will move the camera lookat in relation to the screen	`↑ Shift` + `Mouse movement`
Editor Move the camera lookat in relation to the current editing plane	`↑ Shift` + `Ctrl` + `Mouse movement`
Editor Rotate the view in perspective mode or move the view in orthographic mode	`Mouse movement`
Editor Move the camera lookat in relation to the screen	`↑ Shift` + `Mouse movement`
Editor Zoom in/out on the lookat point using larger steps	`↑ Shift` + `Ctrl` + `Mouse wheel up and down`
Editor Open related dialog to object below the mouse	`Mouse middle click`