The macro package or program a specific register belongs to is appended in brackets.
A register name x consisting of exactly one character can be
accessed as ‘\nx’. A register name xx consisting of exactly
two characters can be accessed as ‘\n(xx’. Register names
xxx of any length can be accessed as ‘\n[xxx]’.
$$: Built-in Registers%: Page Control%: Page Layout.$: Parameters.a: Manipulating Spacing.A: Built-in Registers.b: Artificial Fonts.br: Requests.C: Implementation Differences.c: Built-in Registers.cdp: Environments.ce: Manipulating Filling and Adjusting.cht: Environments.color: Colors.csk: Environments.d: Diversions.ev: Environments.f: Font Positions.F: Built-in Registers.fam: Font Families.fn: Font Families.fp: Font Positions.g: Built-in Registers.h: Diversions.H: Built-in Registers.height: Artificial Fonts.hla: Manipulating Hyphenation.hlc: Manipulating Hyphenation.hlm: Manipulating Hyphenation.hy: Manipulating Hyphenation.hym: Manipulating Hyphenation.hys: Manipulating Hyphenation.i: Line Layout.in: Line Layout.int: Line Control.j: Manipulating Filling and Adjusting.k: Page Motions.kern: Ligatures and Kerning.l: Line Layout.L: Manipulating Spacing.lg: Ligatures and Kerning.linetabs: Tabs and Fields.ll: Line Layout.lt: Page Layout.M: Colors.m: Colors.n: Environments.ne: Page Location Traps.ns: Manipulating Spacing.o: Line Layout.O: Built-in Registers.p: Page Layout.P: Built-in Registers.pe: Page Location Traps.pn: Page Layout.ps: Fractional Type Sizes.psr: Fractional Type Sizes.pvs: Changing Type Sizes.R: Built-in Registers.rj: Manipulating Filling and Adjusting.s: Changing Type Sizes.slant: Artificial Fonts.sr: Fractional Type Sizes.ss: Manipulating Filling and Adjusting.sss: Manipulating Filling and Adjusting.sty: Changing Fonts.t: Page Location Traps.T: Built-in Registers.tabs: Tabs and Fields.trunc: Page Location Traps.u: Manipulating Filling and Adjusting.U: Built-in Registers.v: Changing Type Sizes.V: Built-in Registers.vpt: Page Location Traps.w: Environments.warn: Debugging.x: Built-in Registers.Y: Built-in Registers.y: Built-in Registers.z: Diversions.zoom: Changing Fontsc.: Built-in Registersct: Page MotionsDD [ms]: ms Document Control Registersdl: Diversionsdn: Diversionsdw: Built-in Registersdy: Built-in RegistersFAM [ms]: ms Document Control RegistersFF [ms]: ms Document Control RegistersFI [ms]: ms Document Control RegistersFL [ms]: ms Document Control RegistersFM [ms]: ms Document Control RegistersFPD [ms]: ms Document Control RegistersFPS [ms]: ms Document Control RegistersFVS [ms]: ms Document Control RegistersGROWPS [ms]: ms Document Control RegistersGS [ms]: Differences from AT&T msHM [ms]: ms Document Control RegistersHORPHANS [ms]: ms Document Control Registershours: Built-in Registershp: Page MotionsHY [ms]: ms Document Control RegistersLL [ms]: ms Document Control Registersllx: Miscellaneouslly: Miscellaneousln: Built-in Registerslsn: Leading Spaces Trapslss: Leading Spaces TrapsLT [ms]: ms Document Control RegistersMINGW [ms]: Additional ms MacrosMINGW [ms]: ms Document Control Registersminutes: Built-in Registersmo: Built-in Registersnl: Page Controlopmaxx: Suppressing outputopmaxy: Suppressing outputopminx: Suppressing outputopminy: Suppressing outputPD [ms]: ms Document Control RegistersPI [ms]: ms Document Control RegistersPO [ms]: ms Document Control RegistersPORPHANS [ms]: ms Document Control RegistersPS [ms]: ms Document Control Registersps4html [grohtml]: grohtml specific registers and stringsPSINCR [ms]: ms Document Control RegistersQI [ms]: ms Document Control Registersrsb: Page Motionsrst: Page Motionssb: Page Motionsseconds: Built-in Registersskw: Page Motionsslimit: Debuggingssc: Page Motionsst: Page Motionssystat: I/Ourx: Miscellaneousury: MiscellaneousVS [ms]: ms Document Control Registersyear: Built-in Registersyr: Built-in Registers