For a screen capture to look best on-screen at a zoom level of 100%, it has to be incorporated into the page (at the authoring stage) with a resolution of 96 dpi (Acrobat 6 and higher). The screen capture will then be displayed as intended at a zoom of 100%, and with the least distortion at zoom multiples of 50%. Magnification settings such as Fit Page or Fit Width yield unpredictable zoom levels, and therefore unpredictable display quality of screen captures (due to dynamic on-screen downsampling/upsampling). This is particularly evident in the text in screen captures (missing pixels or blurry areas).
Possible approaches for screen-optimized PDFs include:
- Linked PNG/GIF/JPG graphics displayed in a web browser, opened in a new browser window when the PDF is web-based (PDF: 58K)
- Screen capture displayed in a floating window, Acrobat/Reader 9 or higher (PDF: 224K; distilled with TimeSavers+Multimedia Asst)
- Sample Document (PDF: 53K) and a linked image viewer (PDF: 48K); the default zoom level is restored, if changed, when the reader switches page