Chapter1:Introduction
5
ThereisageneraldiscussionlistforAUCT
E
Xwhichalsocoverspreview-latex,lookathttp://
lists.gnu.org/mailman/listinfo/auctex. Formoreinformationonthemailinglist,senda
messagewithjust the word“help”assubject orbodytoauctex-request@gnu.org. Forthe
developers, thereis the auctex-devel@gnu.org list; it t would d probably y make sense to direct
featurerequests andquestions about internaldetails there. . There e is alow-volume read-only
announcementlistavailabletowhichyoucansubscribebysendingamailwith“subscribe”in
thesubjecttoinfo-auctex-request@gnu.org.
Offerstosupportfurtherdevelopmentwillbeappreciated. Ifyouwanttoshowyourappre-
ciationwithadonationtothemaindeveloper,youcandosoviaPayPaltodak@gnu.org,and
ofcourseyoucanarrangeforservicecontracts orforaddedfunctionality. . Takealookatthe
TODOlistforsuggestionsinthatarea.
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Chapter2:Installation
6
2 Installation
InstallationisnowbeingcoveredinSection“Installation”intheAUCT
E
Xmanual.
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Chapter3:Keybindingsanduser-levellispfunctions
7
3 Keybindingsanduser-levellispfunctions
preview-latexaddskeybindingsstartingwithC-cC-ptothesupportedmodesofAUCT
E
X(See
Infofileauctex,node‘KeyIndex’). Itwillalsoadditsown‘Preview’menuinthemenubar,
aswellasaniconinthetoolbar.
Thefollowingonlydescribestheinteractiveuse:viewthedocumentationstringswithC-hf
ifyouneedtheLispinformation.
C-cC-pC-p
preview-at-point
Preview/Generatepreviews(ortoggle)atpoint
Ifthecursorispositionedonorinsideofapreviewarea,thistogglesitsvisibility,
regeneratingthepreviewifnecessary. Ifnot,itwillrunthesurroundingsthrough
preview. The e surroundings include allareasupto the next validpreview,unless
invalid previews occur before, , in n which case e the e area will include the last t such
preview ineither direction. . Andoverridingany y other action,if aregionis active
(transient-mark-modeorzmacs-regions),itisrunthroughpreview-region.
<mouse-2>
Themiddlemousebuttonhasasimilar actionboundtoitas preview-at-point,
only that it knows which h preview to apply y it toaccording tothepositionof the
click. Youcanclickeitheranywhereonapreviewedimage,orwhenthepreviewis
openedandshowingthesourcetext,youcanclickontheiconprecedingthesource
text. Inotherareas,theusualmousekeyaction(typically:paste)isnotaffected.
<mouse-3>
The right mouse key pops up acontext menu withseveraloptions: : togglingthe
preview,regeneratingit, removing it t (leaving the unpreviewedtext),copyingthe
textinsideofthepreview,andcopyingitinaformsuitableforcopyingasanimage
intoamailornewsarticle.Thisisaone-imagevariantofthefollowingcommand:
C-cC-pC-w
preview-copy-region-as-mml
CopyaregionasMML
Thiscommandisalsoavailableasavariantinthecontextmenuontherightmouse
button(where the regionis thepreviewthat has beenclickedon). . It t copies the
currentregionintothekillbufferinaformsuitableforcopyingasatextincluding
images into amail l or r news articleusing mml-mode(see Section“Composing” in
EmacsMIME).
Ifyouregenerateor otherwisekillthepreviewinitssourcebuffer beforethemail
or news gets posted, , thiswillfail. . Also o youshouldgenerateimages youwantto
send with preview-transparent-border set t tonil, , or r the images will l have an
uglyborder.preview-latexdetectsthisconditionandaskswhethertoregeneratethe
regionwithbordersswitchedoff. Asthisisanasynchronousoperationrunningin
thebackground,you’llneedtocallthiscommandexplicitlyagaintogetthenewly
generatedimagesintothekillring.
Previewyourarticleswithmml-preview(onM-mP,or C-cC-mP inEmacs22) to
makesuretheylookfine.
C-cC-pC-e
preview-environment
Preview/Generatepreviewsforenvironment
Run preview w on L
a
T
E
X environment. . The e environments in preview-inner-
environmentsaretreatedasinnerlevelssothatforinstance,thesplitenvironment
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Chapter3:Keybindingsanduser-levellispfunctions
8
in\begin{equation}\begin{split}...\end{split}\end{equation} isproperly
displayed. Ifcalledwithanumericargument,thecorrespondingnumberofoutward
nestedenvironmentsistreatedasinnerlevels.
C-cC-pC-s
preview-section
Preview/Generatepreviewsforsection
RunpreviewonthisL
a
T
E
Xsection.
C-cC-pC-r
preview-region
Preview/Generatepreviewsforregion
Runpreviewoncurrentregion.
C-cC-pC-b
preview-buffer
Preview/Generatepreviewsforbuffer
Runpreviewonthecurrentbuffer.
C-cC-pC-d
preview-document
Preview/Generatepreviewsfordocument
Runpreviewonthecurrentdocument.
C-cC-pC-cC-p
preview-clearout-at-point
Preview/Removepreviewsatpoint
Clearout(remove)thepreviewsthatareimmediatelyadjacenttopoint.
C-cC-pC-cC-s
preview-clearout-section
Preview/Removepreviewsfromsection
Clearoutallpreviewsincurrentsection.
C-cC-pC-cC-r
preview-clearout
Preview/Removepreviewsfromregion
Clearoutallpreviewsinthecurrentregion.
C-cC-pC-cC-b
preview-clearout-buffer
Preview/Removepreviewsfrombuffer
Clear out all previews s in n current buffer. . This s makes the current t buffer lose e all
previews.
C-cC-pC-cC-d
preview-clearout-document
Preview/Removepreviewsfromdocument
Clearoutallpreviewsincurrentdocument.Thedocumentconsistsofallbuffersthat
havethesamemasterfileasthecurrentbuffer. Thismakesthecurrentdocument
loseallpreviews.
C-cC-pC-f
preview-cache-preamble
Preview/Turnpreamblecacheon
Dumpapregeneratedformatfile. Fortherestofthesession,thisfileisusedwhen
running onthe same master r file. . Use e this if youknow your L
a
T
E
Xtakes a long
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Chapter3:Keybindingsanduser-levellispfunctions
9
time to start up,the speedup will be most noticeable whengenerating single or
fewpreviews. Ifyouchangeyourpreamble,dothisagain. . preview-latexwilltryto
detectthenecessityofthatautomaticallywheneditingchangestothepreambleare
donefromwithinEmacs,butitwillnotnoticeifthepreambleeffectivelychanges
becausesomeincludedfileorstylefileistamperedwith.
C-cC-pC-cC-f
preview-cache-preamble-off
Preview/Turnpreamblecacheoff
Clearthepregeneratedformatfileandstopusingpreamblesforthecurrentdocu-
ment.Ifthecachinggivesyouproblems,usethis.
C-cC-pC-i
preview-goto-info-page
Preview/ReadDocumentation
Readtheinfomanual.
M-xpreview-report-bugRET
preview-report-bug
Preview/ReportBug
Thisisthepreferredwayofreportingbugsasitwillfillinwhatversionofpreview-
latexyouareusingaswellasversions ofrelevantothersoftware,andalsosomeof
themoreimportantsettings. Pleaseusethismethodofreporting,ifatallpossible
andbeforereportingabug,havealookatChapter5[Knownproblems],page12.
C-cC-k
LaTeX/TeXOutput/KillJob
Killsthepreview-generatingprocess.ThisisreallyanAUCT
E
Xkeybinding,butit
isincludedhereasahint. Ifyouaregeneratingapreviewandthenmakeachange
tothebuffer,preview-latexmaybeconfusedandplacethepreviewswrong.
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Chapter4:Simplecustomization
10
4 Simplecustomization
Customization options s canbefound d by y typingM-xcustomize-groupRETpreviewRET. . Re-
membertosettheoptionwhenyouhavechangedit. Thelistofsuggestionscanbemadevery
long(andiscoveredindetailinChapter6[Foradvancedusers],page14),butsomeare:
 Changethecolorofthepreviewbackground
Ifyouuseanon-whitebackgroundinEmacs,youmighthavecolorartifactsat theedges
of your previews. . Playing g around with the e option n preview-transparent-color in the
PreviewAppearance group p might t improve e things. . Withsome e settings, the cursor r may
coverthewholebackgroundofapreview,however.
Thisoptionisspecifictothedisplayengineinuse.ItsdefaultisdifferentinEmacs21and
Emacs22,anditisnotavailableinXEmacs.
 Showing\labels
Whenusingpreview-latex,the\labelsarehiddenbythepreviews. Itispossibletomake
themvisibleintheoutputbyusingtheL
a
T
E
Xpackageshowkeysalternativelyshowlabels.
However, the boxes s of these labels will l be e outside e the region preview-latex x considers as
thepreview image. . Toenable e a similar mechanism internalto preview-latex, enablethe
showlabelsoptioninthevariablepreview-default-option-listinthePreviewLatex
group.
Itmustbenoted,however,thatamuchbetterideamaybetousetheRefT
E
Xpackagefor
managingreferences.SeeSection“RefTeXinaNutshell”inTheRefT
E
XManual.
 Openpreviewsautomatically
The current default is to openpreviews automatically whenyou enter themwithcursor
left/right motions. . Auto-opened d previews will close again once e the cursor leaves them
again(thisisalsodonewhendoingincrementalsearch,orquery-replaceoperations),unless
youchangedanythinginit. Inthatcase,youwillhavetoregeneratethepreview(viae.g.,
C-cC-pC-p).Otheroptionsforpreview-auto-revealareavailableviacustomize.
 Automaticallycachepreambles
Currentlypreview-latex asksyouwhetheryouwanttocachethedocumentpreamble (ev-
erythingbefore\begin{document})beforeitgeneratespreviewsforabufferthefirsttime.
Cachingthepreamblewillsignificantlyspeedupregenerationofpreviews.Thelargeryour
preambleis,themorethiswillbeapparent. Onceapreambleiscached,preview-latexwill
trytokeeptrackofwhenitischanged,anddumpafreshformatinthatcase. Ifyouex-
perienceproblemswiththis,orifyouwantittohappenwithoutaskingyouthefirsttime,
youcancustomizethevariablepreview-auto-cache-preamble.
 Attempttokeepcountersaccuratewhenediting
Sincepreview-latexfrequentlyrunsonlysmallregions throughL
a
T
E
X,valueslikeequation
counters arenot consistentfromruntorun. . If f thisbothers you, customizethevariable
preview-preserve-counterstot(thisisconsultedbypreview-required-option-list).
L
a
T
E
Xwillthenoutput aloadofcounter informationduringcompilation,andthis infor-
mation willbe usedon subsequent t updates s to o keep counters set t to o useful values. . The
additionalinformationtakes additionaltime to analyze, , but t this is relevantmostly only
whenyouareregeneratingallpreviewsatonce,andmaybeyouwillbelesstemptedtodo
sowhencountersappearmoreorlesscorrect.
 PreviewyourfavouriteL
a
T
E
Xconstructs
Ifyouhaveacertainmacroorenvironmentthatyouwanttopreview,firstcheckifitcan
bechosenbycutomizingpreview-default-options-listinthePreviewLatexgroup.
Ifitisnotavailablethere,youcanaddittopreview-default-preamblealsointhePreview
Latexgroup,byaddinga\PreviewMacroor\PreviewEnvironmententry(seeSection6.1.2
Chapter4:Simplecustomization
11
[Providedcommands],page17)afterthe\RequirePackageline.Forexample,ifyouwant
topreviewthecenterenvironment,presstheShowbuttonandthelastINSbutton,then
add
\PreviewEnvironment{center}
inthespacethatjustopened. Notethatsincecenterisagenericformattingconstructof
L
a
T
E
X,ageneralconfigurationlikethatis not quiteprudent. . Youbetter r todothis ona
per-documentbasesothatitiseasytodisablethisbehaviorwhenyoufindthisparticular
entrygivesyoutrouble.
One possibility is tosavesuchsettings inthe correspondingfile-localvariable insteadof
yourglobalconfiguration(seeSection“LocalVariablesinFiles”inGNUEmacsManual).
Aperhapsmoreconvenientplaceforsuchoptions wouldbeinaconfigurationfileinthe
samedirectorywithyourproject(seeSection6.1.1[Packageoptions],page14).
Theusualfileforpreview-latexpreconfigurationisprauctex.cfg. Ifyoualsowanttokeep
thesystemwidedefaults,youshouldaddaline
\InputIfFileExists{preview/prauctex.cfg}{}{}
to your ownversion of prauctex.cfg (this is s assuming g that global files s relating g to the
previewpackageareinstalledinasubdirectorypreview,thedefaultbehavior).
 Don’tpreviewinlinemath
Ifyouhaveperformance problems because your document isfullofinline math($...$),
orif yourusageof$ conflictswithpreview-latex’s,youcanturnoffinlinemathpreviews.
InthePreviewLatex group, , remove textmath h frompreview-default-option-listby
customizingthisvariable.
Chapter5:Knownproblems
12
5 Knownproblems
Anumberofissuesareknownconcerningtheinteroperationwithvariousothersoftware.Some
oftheknownproblemscanbesolvedbymovingtonewerversionsoftheproblematicsoftware
orbysimplepatches.
If you find something not t mentioned here, please send a a bug report t using M-xpreview-
report-bugRET, which h will fill in a lot of information interesting g to o us andsend it to the
bug-auctex@gnu.orglist.Pleaseusethebugreportingcommandsifatallpossible.
5.1 FontproblemswithDvips
Some fonts have beenreportedtoproduce wrong characters with preview-latex. . preview-latex
callsDvipsbydefaultwiththe option-Pwww inordertoget scalable fontsforniceresults. . If
youareusingantialiasing,however,theresultsmightbesufficientlynicewithbitmappedfonts,
anyway. Youmighttry-Ppdffor r anotherstabat scalable fonts,or other printer definitions.
Use
M-x customize-variable RET T preview-fast-dvips-command RET
and
M-x customize-variable RET T preview-dvips-command RET
inordertocustomizethis.
One particular problem is s that t several printer setup files (typically in a a file e called
/usr/share/texmf/dvips/config/config.pdfifyouareusingthe-Ppdfswitch)containthe
Goptionfor‘character shifting’. . This s optionwillresultin‘fi’beingrenderedas‘£’(British
Poundssign)inseveralfonts,unlessyourversionofDvipshasalong-standingbuginitsimple-
mentationfixed(onlyveryrecentversionsofDvipshave).
5.2 Toosmallboundingboxes
TheboundingboxofapreviewisdeterminedbytheL
a
T
E
XpackageusingthepureT
E
Xbounding
boxes. IfthereismaterialextendingoutsideoftheT
E
Xbox,thatmaterialwillbemissingfrom
thepreviewimage. Thishappensforthelabel-showingboxesfromtheshowkeyspackage.This
particularproblemcanbecircumventedbyusingtheshowlabelsoptionofthepreviewpackage.
Ingeneral,youshouldtrytofixtheproblemintheT
E
Xcode,likeavoidingdrawingoutside
ofthepicturewithPSTricks.
Onepossibleremedyistosetpreview-fast-conversionto‘Off’(seeSection6.2[TheEmacs
interface],page20). Theconversionwilltakemoretime,butwillthenusetheboundingboxes
from
EPS
filesgeneratedbyDvips.
Dvipsgenerallydoesnotmissthings,butitdoesnotunderstandPostScriptconstructslike
\resizeboxor\rotate commands,sowillgenerateratherwrongboxes for those. . Dvips s can
behelpedwiththepsfixbbpackageoptiontopreview(seeSection6.1[TheLaTeXstylefile],
page14),whichwilltagthecornersoftheincludedT
E
Xbox. Thiswillmostlybeconvenient
forpurePostScriptstufflikethatcreatedbyPSTricks,whichDvipswouldotherwisereserveno
spacefor.
5.3 x-symbolinteroperation
Thankstothework ofChristophWedler,startingwithversion‘4.0h/beta’of x-symbol,the
lineparsingofAUCT
E
Xandpreview-latexisfullysupported.Earlierversionsexhibitproblems.
However,versionsbefore4.2.2willcauseadrasticslowdownofpreview-latex’sparsingpass,so
wedon’trecommendtouseversionsearlierthanthat.
Chapter5:Knownproblems
13
Ifyouwonderwhatx-symbolis,itisapackagethattransformsvarioustokensandsubscripts
toamorereadableformwhileeditingandoffersafewinputmethodshandyespeciallyfordealing
withmath. Takealookathttp://x-symbol.sourceforge.net.
x-symbolversionsupto4.5.1-betaatleastrequirean8bit-cleanT
E
Ximplementation(mean-
ingthatitsterminaloutputshouldnotuse‘^^’-startedescapesequences)forcooperationwith
preview-latex.Laterversionsmaygetalongwithoutit,likepreview-latexdoesnow.
If you experience problems withcirc.tex inconnectionwithbothx-symbol andLatin-1
characters,youmayneedtochangeyourlanguageenvironmentor,asalastresort,customize
thevariableLaTeX-command-stylebyreplacingthecommandlatexwithlatex-translate-
file=cp8bit.
5.4 Middle-clickspasteinsteadoftoggling
Thisisprobablythefaultofyourfavoritepackage.flyspell.elandmouse-drag.elareknown
tobeaffectedinversionsbeforeEmacs21.3. Upgradetothemostrecentversion.Whatversion
ofXEmacsmightcontainthefixesisunknown.
isearch.el also shows s this s effect while searches s are in progress, but t the code is such h a
complicatedmessthatnopatchisinsight.BetterjustendthesearchwithRETbeforetoggling
and resume with C-sC-s s or similar afterwards. . Since e previews over the current match will
auto-open,anyway,thisshouldnotbemuchofaprobleminpractice.
Chapter6:Foradvancedusers
14
6 Foradvancedusers
Thispackageconsistsoftwoparts: aL
a
T
E
Xstylethatsplitstheoutputintoappropriateparts
withonepreviewobjectoneachpage,andanEmacs-lisppartintegratingthethingintoEmacs
(aidedbyAUCT
E
X).
6.1 TheL
a
T
E
Xstylefile
Themainpurposeofthispackageistheextractionofcertainenvironments(mostnotablydis-
playedformulas)fromL
a
T
E
Xsources asgraphics. . This s works with
DVI
filespostprocessedby
either Dvips and d Ghostscript t or dvipng, , but t it also works when n you are using PDFT
E
Xfor
generatingPDFfiles(usuallyalsopostprocessedbyGhostscript).
Currentuses ofthepackageincludethe preview-latexpackageforWYSIWYGfunctionality
intheAUCT
E
Xeditingenvironment,generationofpreviewsinLyX,aspartoftheoperationof
theps4pdfpackage,thetbookXMLsystemandsomeothertools.
Producing
EPS
fileswithDvipsanditsderivativesusingthe-Eoptionisnotagoodalter-
native: People e makedo by fiddlingaroundwith\thispagestyle{empty} andhopingforthe
best (namely,that the specified d contents s willindeed d fit t onsinglepages),andthen n tryingto
guessthebaselineoftheresultingcodeandstuff,butthisisatbestdissatisfactory.Thepreview
packageprovidesaneasywaytoensurethatexactlyonepageperrequestgetsshipped,witha
well-definedbaselineandnopagedecorations.Whileyoustillcanusethepreviewpackagewith
the‘classic’
dvips -E -i
invocation, there arebetter r ways available that don’t rely onDvips not getting confused d by
PostScriptspecials.
For mostapplications,you’llwanttomake use ofthetightpage option. . Thiswillembed
thepagedimensionsinto the PostScriptorPDFcode,obliteratingtheneedtousethe-E-i
optionstoDvips. YoucanthenproduceallimagefileswithasinglerunofGhostscriptfroma
singlePDForPostScript(asopposedto
EPS
)file.
VariousoptionsexistthatwillpassT
E
Xdimensionsandotherinformationabouttherespec-
tiveshippedoutmaterial(includingdescendersize)intothelogfile,whereexternalapplications
mightmakeuseofit.
ThepossibilityforgeneratingawholesetofgraphicswithasinglerunofGhostscript(whether
fromL
a
T
E
XorPDFL
a
T
E
X)increasesbothspeedandrobustnessofapplications.Itisalsofeasible
tousedvipngona
DVI
filewiththeoptions
-picky -noghostscript
toomitgeneratinganyimagefilethatrequiresGhostscript,thenletascriptgenerateallmissing
filesusingDvips/Ghostscript.Thiswillusuallyspeeduptheprocesssignificantly.
6.1.1 Packageoptions
Thepackageisincludedwiththecustomary
\usepackage[options]{preview}
Youshouldusuallyloadthispackageasthelastone,sinceitredefinesseveralthingsthatother
packagesmayalsoprovide.
Thefollowingoptionsareavailable:
active
isthemostessentialoption.Ifthisoptionisnotspecified,thepreviewpackagewill
beinactiveandthe documentwillbetypeset as ifthe previewpackagewere not
loaded,except that alldeclarations andenvironments definedbythe package are
stilllegalbuthavenoeffect.Thisallowsdefiningpreviewingcharacteristicsinyour
document,andonlyactivatingthembycallingL
a
T
E
Xas
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