Change the image size - Pixelmator Pro User Guide

You can change the size of images to reduce or enlarge them. The image size can be set using pixels or a print unit, such as inches or centimeters. PixelmatorProPixelmatorPhotoPixelmatorforiOSPixelmatorClassicTutorialsBlogCommunitySupport PixelmatorPro UserGuide TableOFCONTENTS QuickLinks What'snew? PixelmatorProbasics Create,open,andsaveimages Workingwithlayers PixelmatorProkeyboardshortcuts TableofContents ChangetheimagesizeYoucanchangethesizeofimagestoreduceorenlargethem.Theimagesizecanbesetusingpixelsoraprintunit,suchasinchesorcentimeters.However,printunitsontheirownhavenorelationshiptopixelsbecauseapixelhasnophysicalsize.Forthisreason,thereisanadditionalResolutionfieldthatspecifieshowmanypixelsshouldbeprintedinaninchorcentimeter. Ifyouareworkingonanimagefortheweboronethatwillonlybedisplayedonascreen,youshouldsizeandresizeimagesusingpixels(andyoucanignoretheResolutionsettingcompletely).Ifyouareworkingonanimagethatwillbeprinted,youshoulduseprintunitswithanappropriateresolution. Whenresizingimages,youcanalsochoosefromfourimagescalingalgorithms,includingthemachinelearning-poweredMLSuperResolution(availableonmacOS10.14andlater). Changethepixeldimensionsofanimage Dooneofthefollowing: ChooseImage>ImageSize(fromtheImagemenuatthetopofyourscreen). PressOption⌥+Command⌘+Ionyourkeyboard. ChoosepixelsfromtheUnitpop-upmenu. Enteranewwidthandheightfortheimage. Note:Ifyou’dliketoresizetheimagewithoutkeepingitsoriginalproportions,deselecttheScaleproportionallycheckbox. ClickOKtoapplyyourchangesorCanceltocancelthem. Note:Whenchangingthepixelsizeofanimage,theResolutionhasabsolutelynoeffectontheactualsizeorqualityoftheimage.Thestandardnumberusedis72or300,butthisisessentiallyplaceholdertextforanyimagesizedinpixels.Ifyouneedtochangetheprintsizeofanimage,seethesectionbelow. Changetheprintdimensionsofanimage Dooneofthefollowing: ChooseImage>ImageSize(fromtheImagemenuatthetopofyourscreen). PressOption⌥+Command⌘+Ionyourkeyboard. Chooseaprintunit(inches,cm,mm,orpoints)fromtheUnitpop-upmenu. Enteranewwidthandheightfortheimage. Note:Ifyou’dliketoresizetheimagewithoutkeepingitsoriginalproportions,deselectScaleproportionally. Enteranewresolutionfortheimage. Whenyouchangetheprintdimensionsofanimage,you’reessentiallychangingitspixeldimensionsindirectlybylettingPixelmatorProcalculatethesizeforyou.ThebasicformulaforthisisPrintSizexResolution=PixelDimensions.So,ifyouhavea10x10inchimageat300PPI,itspixelsizewouldbe3000x3000. Note:Ifyou’dliketochangetheprintdimensionsofanimagewithoutchangingthequalityoftheimage(oritspixeldimensions),deselecttheResamplecheckbox.Thisway,changingtheresolutionwillautomaticallychangetheprintdimensionsandviceversa,ensuringthepixelsizeoftheimagestaysthesame.Notethatbecauseyou'llbechangingthephysicalsizeoftheimage,pixelsasmeasurementunitswillbegrayedout. ClickOKtoapplyyourchanges. Thestandardresolutionforhigh-qualityprintsis300pixels/inch(PPI),althoughalowerresolutionisoftenusedforlargerpostersandothermediathatisviewedfromadistancewhereitwouldbedifficulttoseeindividualpixels.Forwebgraphicsandimages,aresolutionof72PPIisoftenusedasthedefault,althoughthisisessentiallyplaceholdertextaswebimagesshouldalwaysbesizedinpixels. ChooseadifferentimagescalingalgorithmInPixelmatorPro,youcanresizeimagesusingoneoffourscalingalgorithms:Bilinear,Lanczos,NearestNeighbor,andMLSuperResolution. Tochooseascalingalgorithm: Dooneofthefollowing: ChooseImage>ImageSize(fromtheImagemenuatthetopofyourscreen). PressOption⌥+Command⌘+Ionyourkeyboard. Selectthealgorithm: TheBilinearalgorithmismoreorlessthestandardinimageediting.Ittriestonaturallysmoothedges(transitionsbetweenlightanddarkcolors)byguessingtheintermediatecolors,soit'susefulforphotographicimages.However,thiscansometimescauseblurryimages(especiallywhenupscaling). TheLanczosalgorithmisdesignedtopreservesmalldetailswhenupscalinganddownscaling,whichisusefulforthingslikegraphics,thoughit'simportanttowatchoutforhaloingissues. TheNearestNeighboralgorithmismostlyusedforpixelart,asitcopiesthecolorofthenearestneighboringpixelsresultingintheclassicblockyimagelook. MLSuperResolution(availableonmacOS10.14andlater)isamachinelearning-poweredscalingalgorithm,trainedtointelligentlyupscaleimageswhilepreservingdetailsthatcanoftenbelostwhenusingtraditionalscaling.Unliketheregularscalingalgorithmsthatinterpolatethevaluesofpixelsmathematically,MLSuperResolutionlooksattheimageitself,analyzingthepatternsandtexturesinit,thenrecreatesvisuallyimportantdetailsinlargerdimensions.Youcanachievegreatresultswhenupscalingimagestoeventhreetimestheiroriginalresolution.TolearnmoreaboutMLSuperResolutionandhowwe'vebuiltit,checkoutourcomprehensiveblogpost. SEEALSO Changethecanvassize Cropandstraightenanimage Rotateandflipanimage Trimawaycoloredortransparentbordersaroundanimage Revealpartsofanimagebeyondthecanvas PixelmatorProUserGuide Welcome What'snew? PixelmatorProbasics IntrotoPixelmatorPro Interfaceoverview PixelmatorProtools Zoom,scroll,androtatetheimagecanvas Zoominandoutofanimage Scrollandpananimage UsetheZoomtool Rotatetheimagecanvas Undoorredochanges Choosingcolors UsethePixelmatorProPhotosextension PrintaPixelmatorProdocument Customizeyourapp AboutPixelmatorPropreferences Setgeneralpreferences Setruler,grid,andguidepreferences Setworkspacepreferences SetPhotosExtensionpreferences SetApplePencilpreferences Showorhideoverlays ChangethePixelmatorProlayout CustomizetheToolssidebar CustomizethePixelmatorProtoolbar UsetheTouchBarwithPixelmatorPro AutomatetasksinPixelmatorPro Create,open,andsaveimages Createanemptyimage Openanimage Closeanimage Saveandnameanimage EditfromPhotos Importanimage AboutthePixelmatorProfileformat Workingwithlayers Aboutlayers Rasterandvectorlayers Createlayers Replaceimage UsetheArrangetool Selectlayers Moveandalignlayers Resize,rotate,andfliplayers Transformlayers Convertlayersintopixels Userulers Usealignmentguides Organizeandmanagelayers Removelayerbackground Uselayermasks Useclippingmasks OpenandeditimageswithPortraitMasks Customizelayersusinglayerstyles Aboutlayerstyles Adjusttheopacityofalayer Changetheblendmodeofalayer Addanoutlinearoundalayer Fillalayerwithacolororgradient Addaninnershadowtoalayer Addadropshadowtoalayer Workingwithlayerstyles Layerstylepresets Adjustimagecolors Aboutadjustingcolors Readinghistograms WorkingwithRAWimages Automaticallyimprovethelookofanimage Automaticallyreducenoiseinimages Automaticallymatchimagecolors Whitebalanceanimage Adjusthue,saturation,andvibrance Adjustexposure,highlightandshadowdetail,brightness,contrast,andblackpoint Selectivelybalancethecolorsinanimage Adjustindividualcolorsinanimage Adjustthelevelsofanimage Adjustthetonalcurveofanimage Replaceonecolorinanimagewithanother Manuallyconvertacolorimagetoblackandwhite Convertanimagetoblackandwhitewithacolortint Applyasepiatint Fadetheshadowsorhighlightsofanimage Mixthecolorchannelsofanimage Invertthecolorsofanimage Applyavignette Sharpenanimage Addfilmgraintoanimage Workingwithcoloradjustments Coloradjustmentpresets Colormanagement Aboutcolormanagement Changethecolorprofileofanimage Changethecolordepthofanimage Seewhatanimagelookslikeonanotherdevice ApplyLUTs Retouchandreshapeareasofanimage Aboutretouchingandreshapingimages Removeanobjectfromanimage Copypartofanimagefromoneareatoanother Lightenaspecificareaofanimage Darkenaspecificareaofanimage Makeaspecificareaofanimagemorevibrant Desaturateaspecificareaofanimage Sharpenaspecificareaofanimage Softenaspecificareaofanimage Smudgeaspecificareaofanimage Warpaspecificareaofanimage Bumpaspecificareaofanimage Pinchaspecificareaofanimage Twirlaspecificareaofanimage Createandapplyeffects Abouteffects Applyblureffects Applydistortioneffects Applysharpeneffects Applycoloradjustmenteffects Applytileeffects Applystylizeeffects Applyhalftoneeffects Applygeneratoreffects Applyfilleffects Applyothereffects Workingwitheffects Effectpresets Paintanderase PaintwiththePainttool Strokewithabrush Quicklyfillanimagewithcolor Fillspecificareasofanimagewithcolor FillwiththeGradientFilltool PaintwiththePixelPainttool EraseusingtheErasetool EraseusingtheSmartErasetool Editandcreatebrushes Editabrush Createabrush Shareandimportbrushes Makeselections Aboutselectionsinimageediting Selectpreciseareasofanimage Quicklyselectanobjectorareainanimage Snapaselectionaroundanobjectorareainanimage Drawafreehandselection Makeastraight-edgedselection Selectsimilarlycoloredareasofanimage Makearectangularselection Makeanellipticalselection Makeacolumnselection Makearowselection Selectacolorrange Selectallopaqueareasofalayer Selecttheentireimage Automaticallyselectasubjectinanimage Adjustselections Refineselections Move,copy,anddeleteselectedareas Convertselectionsintoshapes Drawshapesandvectorgraphics Aboutshapesandvectorgraphics Addandeditshapes Arrangeandcombineshapes DrawshapeswiththePentool DrawshapeswiththeFreeformPentool Editvectorpaths Saveandsharecustomshapes Add,edit,andformattext Addtext UsetheTypetool Addtextaroundtheoutlineofashape Addcurvedorcirculartext Addtextonapath Addtextonafreeformpath Copyandpastetext Usedictationtoentertext Changethelookoftext Changethefontorfontsize Addbold,italic,underline,orstrikethroughtotext Addorremoveatextoutline Changethecoloroftext Changetextcapitalization Alignandspacetext Formatcharacters Converttextintoashapeorpixellayer Textstylepresets Resize,cropandstraightenimages Changetheimagesize Changethecanvassize Cropandstraightenanimage Rotateandflipanimage Trimawaycoloredortransparentbordersaroundanimage Revealpartsofanimagebeyondthecanvas Croppresets Exportandshareimages Exportanimagetoadifferentfileformat Exportanimagefortheweb Slicedesignsintoindividualimages Quicklyexportorshareanoptimizedimage Exportpresets PixelmatorProkeyboardshortcuts PreviousTextstylepresetsNextChangethecanvassize