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You may often find yourself needing to add page numbers to a PDF document to enhance navigability or stamp a date for version tracking purposes . Adobe may not have directly threatened a lawsuit over Microsoft 's inclusion of PDF creation functionality with the pending version of Office , but it is clearly unhappy with the feature . I am reinforced in my notion that it is the upgrade that matters more than the full version , as I find on Amazon.com that purchasers of the full version cannot lay claim to the diverse interests of the upgraders . Datalogics has also gotten into the act , releasing a new version of the Adobe PDF Library for licensing . Company spokesperson Kevin Lynch , Senior Vice-President and Chief Software Architect at Adobe , said the announcement is the " next logical step in the evolution of PDF from de facto standard to a formal , de jure standard . With few exceptions , traditional pointe shoes have shanks made from a paper product such as cardboard or fibreboard - hence the lack of durability . It is not that difficult a step , in fact , as I was to realize when , years later , I suddenly discovered that I could do it , and this story of my struggles with it will reveal to any experienced dancer , more than any modest disclaimers on my part could , the depths of my ineptitude . My stepson was three and could n't be left alone , and I did n't feel comfortable going to class without Pat , with Alice always managing to be next to me at the barre , making little sotto voce remarks , and contriving ways to get me to touch her .