Intypesettingandprinting,thetextsizeformedbytheheightandwidthofthetextiscalculatedbyauniqueunitofmeasurement,namelypointsandciceros.Moderncommonlyusedpoint(pt)asaunit.
Fournier,France,inventedthepointsystemmeasurementsystemin1675,whichwaslaterimprovedbytheParisianfontmakerFirminDidotoestablishamoderntypesettingmeasurementsystem,andthenDidoimprovedthepointsystemThesystemisgraduallyadoptedthroughoutEurope.Nowadays,theDiddopointsystemismainlyusedinEurope,andtheBritish-AmericanpointsystemismainlyusedinEnglandandtheUnitedStates.The"points"inthesetwopointsystemsarethesmallestunitsofmeasurement.
Inconventionales rationes, fontsizeisin "punctis". Thesize of the type mobiles called "fontsize";
1point(Diduopoint)=0.376mm=1.07UKPoint=0.0148inch=0.00123inch.
1point(BritishAmericanpoint)=0.3527mm=1/72inch(pointinOffice)
"Pound"referstothetransliterationofpointPronunciation,thecorrectChinesetranslationshouldbe"点"or"点数".
Solet, quot libras" audis, certa verba sunt communia nomina, et professiones vocant puncta". Pointisabbreviatedaspt, exempli gratia: 4pt, quod est puncta.