Newsletter Index

1. How to set Javelin3 as the default app for PDF files on the Mac

Right-click on a file that uses the file type you'd like to change the default for. ... i.e. any PDF you select in Finder
Click on Get Info in the pop-up
Click Open With if the section isn't already expanded
Click the dropdown and choose an app... in this case Javelin3
Click Change All... so all PDF files will now open in Javelin3

2. How to sell multiple secured PDFs in one go, as a "bundle"

For offline usage:
(i) Create a single set of "common codes" for the files to be included in the bundle
(ii) Create a new "product" in your ordering system for the bundle, and allow users to order the bundle
(iii) Issue a code from the list created in step 1 to the customer - the instructions for file downloading are then as per the individual files - the simplest arrangement is to use a "catalog" file that contains all the separate files - there is no need to provide a separate zipped fileset of the secured files, but this is an option of course - zipped files are best used only for PCs and Macs, rather than mobile devices
Example: See one of our own catalog pages: where items can be ordered singly or as a bundle of 4 titles
For online usage:
(i) Create the online files using our PDF2HTML5 service or arrange with us to generate them for you. Assign each files to be Private and associated with a specific usergroup that you have admin or subadmin control over - if you need more usergroups then ask us to enable these for you
(ii) Create an index page that points to each of the titles, with or without separate login according to your website preferences. The user will need to login to the first of the files they wish to access unless auto-login has been set for these files and/or that user - with Webdoxx services autologin can be provided for all users within a specified IPAddress range, e.g. all users in a particular hospital or college
(iii) For each user or purchaser of the files, create a user record with membership of the usergroup selected and no expiry or a selected expiry date if limited time access or a subscription service is being provided

3. How to decide on PDF file size and quality?

Javelin readers are regularly used with very large and complex documents - in terms of page length, 2000+ pages are not uncommon and some customers have files with 10,000+ pages. In terms of MBytes our broad recommendation is to try and keep individual files to under 50Mbytes if possible, but we have many customers with files of 200Mbytes or more in size (e.g. in aerospace engineering). Here are some recommendations and comments that may be useful:
(i) check that the program used to create the source file, e.g. MS Word or InDesign, is set to export the PDF as "smallest file size" or "for screen display" and then review the quality of the result by opening the PDF using Javelin3 for Windows or Javelin3 for Mac. If the quality is not good enough, try adjusting the export settings to produce a higher quality output. In general full "print ready" high resolution is not required for screen usage. Most desktop/laptop devices have a screen resolution of less than 100dpi. Some mobile devices and tablets have a screen resolution of around 300dpi
(ii) make sure there are no embedded media files, like videos etc. - if media files are needed, provide them via a hyperlink to a web-hosted facility like Vimeo or YouTube or via a separate application.
(iii) smaller file sizes in terms of Mbytes (rather than the number of pages) are faster to load, faster to navigate and search and faster to download than large file size, so keeping files small is generally a good idea. This particularly applies to use of large files on older mobile and desktop devices and in cases where communications facilities are not as fast or robust as might be hoped for.
(iv) Page size is not immediately obvious as an issue, but because PDF files are fixed format pages, it is important to think about the target devices and their screen size and zoom capabilities. In general we recommend keeping all pages in a file the same size and orientation (if possible), and aiming for small page sizes (A4/US Letter or less) rather than very large page sizes. In some instances, e.g. electrical layout diagrams, this may not be possible, so we recommend checking the PDFs on Javelin3 readers before securing and issuing them.
(v) ideally generate the PDF using an Adobe product, and with a maximum Adobe reader compatibility to be Adobe reader 7, which equates to PDF version 1.6 (1+6=7). It is always a good idea to check the resulting PDF on a range of devices and readers, and Javelin3 readers. On Apple devices (Mac and iOS devices) we always use Apple's own PDF library, so if it looks OK and works on their default PDF readers (e.g. Preview) then it should be fine on Javelin3.

4. Can screen capture be prevented?

No system can prevent screen capture - again, this is for lots of reasons, and is obvious when you consider delivery (online or offline) to tablet devices - these have screen capture built into the hardware, so no software system can prevent it - that is why we strongly recommend publishers use static and dynamic watermarking, so any screen capture events are identified by variables such as date, time, user identification, IPaddress, deviceID etc. This is a strong deterrent against abuse.