A textStyle comprises the formatting information for composing and displaying a unit (usually a paragraph) of text. Typically one makes a copy of a master textStyle (such as TextStyle default), and then that copy may get altered in the process of editing. Bad things can happen if you do not copy first.

Each of my instances consists of...
fontArray An array of StrikeFonts
fontFamilySize unused
lineGrid An integer; default line spacing for paragraphs
baseline An integer; default baseline (dist from line top to bottom of an 'a')
alignment An integer; text alignment, see TextStyle alignment:
firstIndent An integer; indent of first line in pixels
restIndent An integer; indent of remaining lines in pixels
rightIndent An integer; indent of right margin rel to section
tabsArray An array of integers giving tab offsets in pixels
marginTabsArray An array of margin tabs
leading An integer giving default vertical line separation

For a concrete example, look at TextStyle default copy inspect

	accessing
	alignment alignment: alignmentSymbol baseline baseline: centered defaultFont firstIndent firstIndent: fontNamed: fontNames fontNamesAndSizes fontNamesWithPointSizes justified leading leading: leftFlush lineGrid lineGrid: printOn: restIndent restIndent: rightFlush rightIndent rightIndent:

	comparing
	= species

	default font
	defaultFontIndex defaultFontIndex:

	fonts and font indexes
	collectionFromFileNamed: consistOnlyOf: flushFonts fontIndexOf: fontIndexOfSize: fontOfPointSize: fontOfSize:

	object fileIn

	private
	consolidate fontArray fontAt: fontAt:put: gridForFont:withLead: marginTabAt:side: newFontArray:

	tabs and margins
	clearIndents leftMarginTabAt: nextTabXFrom:leftMargin:rightMargin: rightMarginTabAt: tabWidth

	instance creation
	changeDefaultFontSizeBy: fontArray: initDefaultFontsAndStyle new

	Disk I/O	top
	storeDataOn: The shared arrays in tabsArray and marginTabsArray are the globals DefaultTabsArray and DefaultMarginTabsArray. DiskProxies will be substituted for these in (Array objectForDataStream:).
	veryDeepCopyWith: All inst vars are meant to be shared

	accessing	top
	alignment Answer the code for the current setting of the alignment.
	alignment: Set the current setting of the alignment to be anInteger: 0=left flush, 1=right flush, 2=centered, 3=justified.
	alignmentSymbol Answer the symbol for the current setting of the alignment.
	baseline Answer the distance from the top of the line to the bottom of most of the characters (by convention, bottom of the letter 'A').
	baseline: Set the distance from the top of the line to the bottom of most of the characters.
	centered
	defaultFont
	firstIndent Answer the horizontal indenting of the first line of a paragraph in the style of the receiver.
	firstIndent: Set the horizontal indenting of the first line of a paragraph in the style of the receiver to be the argument, anInteger.
	fontNamed: TextStyle default fontNamed: 'TimesRoman10'
	fontNames TextStyle default fontNames
	fontNamesAndSizes TextStyle default fontNames
	fontNamesWithPointSizes
	justified
	leading Leading (from typographers historical use of extra lead (type metal)) is the extra spacing above and beyond that needed just to accomodate the various font heights in the set.
	leading:
	leftFlush
	lineGrid Answer the relative space between lines of a paragraph in the style of the receiver.
	lineGrid: Set the relative space between lines of a paragraph in the style of the receiver to be the argument, anInteger.
	printOn: Append to the argument, aStream, a sequence of characters that identifies the receiver.
	restIndent Answer the indent for all but the first line of a paragraph in the style of the receiver.
	restIndent: Set the indent for all but the first line of a paragraph in the style of the receiver to be the argument, anInteger.
	rightFlush
	rightIndent Answer the right margin indent for the lines of a paragraph in the style of the receiver.
	rightIndent: Answer the right margin indent for the lines of a paragraph in the style of the receiver to be the argument, anInteger.

	comparing	top
	= Answer whether the receiver and the argument represent the same object. If = is redefined in any subclass, consider also redefining the message hash.
	species Answer the preferred class for reconstructing the receiver. For example, collections create new collections whenever enumeration messages such as collect: or select: are invoked. The new kind of collection is determined by the species of the original collection. Species and class are not always the same. For example, the species of Interval is Array.

	default font	top
	defaultFontIndex
	defaultFontIndex:

	fonts and font indexes	top
	collectionFromFileNamed: Read the file. It is an TextStyle whose StrikeFonts are to be added to the system. (Written by fooling SmartRefStream, so it won't write a DiskProxy!) These fonts will be added to the master TextSytle for this font family. To write out fonts: | ff | ff _ ReferenceStream fileNamed: 'new fonts'. TextConstants at: #forceFontWriting put: true. ff nextPut: (TextConstants at: #AFontName). 'do not mix font families in the TextStyle written out'. TextConstants at: #forceFontWriting put: false. ff close. To read: (TextStyle default collectionFromFileNamed: 'new fonts') *** Do not remove this method ***
	consistOnlyOf:
	flushFonts Clean out the fonts, an aid when snapshotting claims too many are holding onto Display.
	fontIndexOf:
	fontIndexOfSize: Returns an index in fontArray of the font with height <= desiredHeight
	fontOfPointSize:
	fontOfSize: See fontIndexOfSize. Returns the actual font. Leading not considered.

object fileIn

top

	private	top
	consolidate If this style includes any fonts that are also in the default style, then replace them with references to the default ones.
	fontArray Only for writing out fonts, etc. 8/16/96 tk
	fontAt: This is private because no object outside TextStyle should depend on the representation of the font family in fontArray.
	fontAt:put: Automatically grow the array. 8/20/96 tk
	gridForFont:withLead: Force whole style to suit one of its fonts. Assumes only one font referred to by runs.
	marginTabAt:side: The marginTabsArray is an Array of tuples. The Array is indexed according to the marginIndex, the 'nesting' level of the requestor. sideIndex is 1 for left, 2 for right.
	newFontArray: Currently there is no supporting protocol for changing these arrays. If an editor wishes to implement margin setting, then a copy of the default should be stored with these instance variables. , Make size depend on first font.

	tabs and margins	top
	clearIndents Reset all the margin (index) settings to be 0.
	leftMarginTabAt: Set the 'nesting' level of left margin indents of the paragraph in the style of the receiver to be the argument, marginIndex.
	nextTabXFrom:leftMargin:rightMargin: Tab stops are distances from the left margin. Set the distance into the argument, anX, normalized for the paragraph's left margin.
	rightMarginTabAt: Set the 'nesting' level of right margin indents of the paragraph in the style of the receiver to be marginIndex.
	tabWidth Answer the width of a tab.

	constants	top
	default Answer the system default text style.
	defaultFont Answer the default system font
	named:

	instance creation	top
	changeDefaultFontSizeBy: TextStyle changeDefaultFontSizeBy: 1
	fontArray: Answer an instance of me with fonts those in the argument, anArray.
	initDefaultFontsAndStyle This provides the system with 10 and 12-pt basal fonts. Bold and italic versions will be automatically generated as needed
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.