Indentation
Indenting text is a common operation when
dealing with programmatic editing, and Scintilla and Notepad++ have
full support for it. Indentation is the addition of extra whitespace at
the start of a line to separate blocks of text, adding a hierarchy.
Normally when editing, pressing the Tab
key will insert a tab character
at the current location. However, if some text is selected, pressing
the Tab key
(by default) will add additional whitespace at the
beginning of each line that has any selected text, allowing to indent
entire blocks of text at once. Pressing Shift-TAB will remove the
indentation. Indentation is done in levels, each level adding a
predefined amount of whitespace (this amount can be configured, see Preferences). There is also an option of choosing whether
to insert a TAB character or (multiple) spaces (for this, also see Preferences).
Scintilla can show a line/guide for each
level, which can be toggled by selecting
or
pressing 
. This guideline shows a visual cue to keep track of the current indentation level of lines. To change the color used, see Styler Configurator (note that if the guideline matches highlighted braces, it will assume the color of the brace highlight).