Use the General page of the Settings/Preferences dialog to configure the editor behaviour and customize its view.
Honor "CamelHumps" word settings when selecting using double-click
Select this checkbox to have IntelliJ IDEA invoke the CamelHumps selection when words are selected by double-clicking.
This feature works only if the Use 'CamelHumps' words option is enabled.
Change font size (Zoom) with Ctrl/Command+Mouse Wheel
If this checkbox is selected, a particular editor font size can be changed by rolling the mouse wheel while holding the Ctrl key.
This checkbox also affects font size in quick documentation lookup.
If the checkbox is cleared, rolling the mouse wheel while holding the Ctrl key scrolls the editor.
Enable Drag'n'Drop functionality in editor
If this checkbox is selected, you can drag-n-drop code fragments in the editor.
Select this checkbox to apply soft wraps to specific file types (For example, it might be helpful when you are writing documentation in markdown files). In the field, enter file extensions separating them with semicolon.
You can also enable or disable soft wraps right in the editor:
Use original line's indent for wrapped parts
Select this checkbox to use custom indentation for soft wraps on resizing the editor or console. Specify the indent value in the Additional shift text field on the right.
Show soft wrap indicators for current line only
If this checkbox is selected, the soft wrap characters will be shown in the active logical line only.
Otherwise, soft wraps characters will be shown at the end of each line, and at the beginning of each next line.
Allow placement of caret after end of line
If this checkbox is selected, you will be able to set your caret anywhere after the last character in any line. As soon as you start typing at a position beyond the end of the line, the necessary number of spaces will be added between the end of the line and the beginning of your input.
Allow placement of caret inside tabs
Select this checkbox to allow placing the caret inside tab characters. The reason is that each tab character shows in the editor as a set of 'virtual' space characters.
Show virtual space at file bottom
If this checkbox is selected, the currently edited line (even if it is the final line) can be scrolled to the top of the screen. IntelliJ IDEA adds the necessary amount of virtual lines.
Strip trailing spaces on Save
Select the mode in which IntelliJ IDEA will handle trailing spaces at the end of lines on file saving:
Always keep trailing spaces on caret line
If this option is selected, trailing spaces will not be stripped on the line where the caret is placed on save operation (for example, when you switch to another window).
Ensure line feed at file end on Save
Select this checkbox to have IntelliJ IDEA automatically add an empty line in the end of a file during the save procedure.
Show quick documentation on mouse move
Select this checkbox to show quick documentation for the symbol at caret. The quick documentation popup appears after the delay time specified in the Tooltip delay field.
Highlight modified lines in gutter
Select this checkbox if you want added/modified lines to be highlighted with a color stripe in the left editor gutter.
Different color for lines with whitespace-only modifications
This option only becomes available if the Highlight modified lines in gutter option is enabled.
Select this checkbox if you want lines where only whitespaces were added/removed to be highlighted with a different color from lines with more significant modifications.
Use this option to specify the delay for a tooltip appearance.
When moving by words
Use this list to configure where the caret should stop when moved by words. You can select from the following options:
Upon line break
Use this list to configure where the caret should stop on line breaks. You can select from the following options:
|Highlight on Caret Movement|
Highlight matched brace
Select this checkbox to have IntelliJ IDEA highlight pairs of opening/closing braces when you position the caret right before the opening or right after the closing one. It also works for HTML and XML tags.
Highlight current scope
Select this checkbox to have IntelliJ IDEA highlight the available scope for the code typed in the current caret location.
Highlight usages of element at caret
Select this checkbox to have IntelliJ IDEA highlight all usages of the element at which the caret is currently positioned.
Show notification after reformat code action
Select this checkbox to show a notification with changes in your code and a shortcut to the Reformat Code dialog every time you try to reformat the code. Otherwise, IntelliJ IDEA will reformat code silently.
Show notification after optimize imports action
Select this checkbox to show notification with changes in your code. Otherwise, IntelliJ IDEA will optimize imports silently.
If this option is enabled, the editor scrolls the page when you navigate to an element, instead of just jumping to the target location.
Prefer scrolling editor canvas to keep caret line centered
Click this option to choose scrolling editor canvas and keeping the caret at place.
Keeping the caret at place and scrolling the editor canvas can be helpful in course of debugging session. As you step through the lines of code, the editor canvas scrolls, while the line at caret is always in the center of the screen.
Prefer moving caret line to minimize editor scrolling
Click this option to choose moving the caret.
When you step through the lines of code during the debugging session, the caret moves down, and the editor canvas doesn't scroll until the caret line reaches the bottom of the screen.
Enable in-place mode
Select or clear this checkbox to enable or disable in-place refactorings for Java.
The in-place in connection with the refactorings means specifying all or most of the information necessary for the refactoring by typing, right in the editor. All the affected code fragments are highlighted and change as you type. If appropriate, additional refactoring options are selected in corresponding option boxes.
The in-place refactoring mode is available for the following refactorings:
If this checkbox is not selected, the refactoring settings for all of the refactorings are specified in the corresponding dialogs.
Preselect old name
If this checkbox is selected, the old name of a symbol is selected when the Rename refactoring is invoked for that symbol.
If the checkbox is cleared, the symbol being renamed is not selected.
Show inline dialog for local variables
Select this checkbox if you want to display a confirmation dialog for the "Inline local variable" refactoring.
Recent file limit
In this field, specify how many file names can be included in the list of recent files.
Recent locations limit
In this field, specify how many recently viewed code snippets can be included in the list of recent locations.
Copy as rich text by default
Select this checkbox to copy a rich text from the editor to any other editor that recognizes RTF.
Use this list to select a color scheme for the text copy. You can select from the following options:
Error stripe mark min height (pixels)
In this field, specify the minimum size of the error and warning stripes.
Autoreparse delay (ms)
In this field, specify the time period after which IntelliJ IDEA starts reparsing the entered text.
'Next Error' action goes to high priority problems only
Select this checkbox to have IntelliJ IDEA pass through the highest priority problems only (for example, errors), when executing Navigate | Next/Previous Highlighted Error commandF2/Shift+F2.
Clear this checkbox to have IntelliJ IDEA pass through all the existing problems (for example, errors and warnings) sequentially.
Suppress with @SuppressWarnings (for 5.0 only)
Select this checkbox to have
Clear this checkbox to have