Using the Ace editor

Ace is the code editor embedded within Lectora Online. It provides the features and performance of today's native editors, such as syntax highlighting for over a hundred languages, selecting from several themes, code folding, an API, and much more. Refer to this section for tips to improve your experience using Ace.

For more information about working with the Ace editor, visit https://ace.c9.io/#nav=about.

Ace provides the following keyboard shortcuts to streamline the coding process.

Default keyboard shortcuts

Refer to the following default keyboard shortcuts when using Ace.

Line operations

Action	Windows/Linux	Mac
Remove line	Ctrl-D	Command-D
Copy lines down	Alt-Shift-Down	Command-Option-Down
Copy lines up	Alt-Shift-Up	Command-Option-Up
Move lines down	Alt-Down	Option-Down
Move lines up	Alt-Up	Option-Up
Remove to line end	Alt-Delete	Ctrl-K
Remove to linestart	Alt-Backspace	Command-Backspace
Remove word left	Ctrl-Backspace	Option-Backspace, Ctrl-Option-Backspace
Remove word right	Ctrl-Delete	Option-Delete
Split line	---	Ctrl-O

Selection

Action	Windows/Linux	Mac
Select all	Ctrl-A	Command-A
Select left	Shift-Left	Shift-Left
Select right	Shift-Right	Shift-Right
Select word left	Ctrl-Shift-Left	Option-Shift-Left
Select word right	Ctrl-Shift-Right	Option-Shift-Right
Select line start	Shift-Home	Shift-Home
Select line end	Shift-End	Shift-End
Select to line end	Alt-Shift-Right	Command-Shift-Right
Select to line start	Alt-Shift-Left	Command-Shift-Left
Select up	Shift-Up	Shift-Up
Select down	Shift-Down	Shift-Down
Select page up	Shift-PageUp	Shift-PageUp
Select page down	Shift-PageDown	Shift-PageDown
Select to start	Ctrl-Shift-Home	Command-Shift-Up
Select to end	Ctrl-Shift-End	Command-Shift-Down
Duplicate selection	Ctrl-Shift-D	Command-Shift-D
Select to matching bracket	Ctrl-Shift-P	---

Multicursor

Action	Windows/Linux	Mac
Add multi-cursor above	Ctrl-Alt-Up	Ctrl-Option-Up
Add multi-cursor below	Ctrl-Alt-Down	Ctrl-Option-Down
Add next occurrence to multi-selection	Ctrl-Alt-Right	Ctrl-Option-Right
Add previous occurrence to multi-selection	Ctrl-Alt-Left	Ctrl-Option-Left
Move multicursor from current line to the line above	Ctrl-Alt-Shift-Up	Ctrl-Option-Shift-Up
Move multicursor from current line to the line below	Ctrl-Alt-Shift-Down	Ctrl-Option-Shift-Down
Remove current occurrence from multi-selection and move to next	Ctrl-Alt-Shift-Right	Ctrl-Option-Shift-Right
Remove current occurrence from multi-selection and move to previous	Ctrl-Alt-Shift-Left	Ctrl-Option-Shift-Left
Select all from multi-selection	Ctrl-Shift-L	Ctrl-Shift-L

Go to

Action	Windows/Linux	Mac
Go to left	Left	Left, Ctrl-B
Go to right	Right	Right, Ctrl-F
Go to word left	Ctrl-Left	Option-Left
Go to word right	Ctrl-Right	Option-Right
Go line up	Up	Up, Ctrl-P
Go line down	Down	Down, Ctrl-N
Go to line start	Alt-Left, Home	Command-Left, Home, Ctrl-A
Go to line end	Alt-Right, End	Command-Right, End, Ctrl-E
Go to page up	PageUp	Option-PageUp
Go to page down	PageDown	Option-PageDown, Ctrl-V
Go to start	Ctrl-Home	Command-Home, Command-Up
Go to end	Ctrl-End	Command-End, Command-Down
Go to line	Ctrl-L	Command-L
Scroll line down	Ctrl-Down	Command-Down
Scroll line up	Ctrl-Up	---
Go to matching bracket	Ctrl-P	---
Scroll page down	---	Option-PageDown
Scroll page up	---	Option-PageUp

Find/Replace

Action	Windows/Linux	Mac
Find	Ctrl-F	Command-F
Replace	Ctrl-H	Command-Option-F
Find next	Ctrl-K	Command-G
Find previous	Ctrl-Shift-K	Command-Shift-G

Folding

Action	Windows/Linux	Mac
Fold selection	Alt-L, Ctrl-F1	Command-Option-L, Command-F1
Unfold	Alt-Shift-L, Ctrl-Shift-F1	Command-Option-Shift-L, Command-Shift-F1
Fold all	Alt-0	Command-Option-0
Unfold all	Alt-Shift-0	Command-Option-Shift-0

Other

Action	Windows/Linux	Mac
Indent	Tab	Tab
Outdent	Shift-Tab	Shift-Tab
Undo	Ctrl-Z	Command-Z
Redo	Ctrl-Shift-Z, Ctrl-Y	Command-Shift-Z, Command-Y
Show the settings menu	Ctrl-,	Command-,
Toggle comment	Ctrl-/	Command-/
Transpose letters	Ctrl-T	Ctrl-T
Enter full screen	Ctrl-Enter	Command-Enter
Change to lower case	Ctrl-Shift-U	Ctrl-Shift-U
Change to upper case	Ctrl-U	Ctrl-U
Overwrite	Insert	Insert
Macros replay	Ctrl-Shift-E	Command-Shift-E
Macros recording	Ctrl-Alt-E	---
Delete	Delete	---
Center selection	---	Ctrl-L