This specific issue happened with the Calibri font but we think this could also have been an issue with Consolas and Cambria fonts. Removing the bitmap (EBDT, EBLC & EBSC) when subsetting resolved the issue. Adobe Reader seem to be using these bitmap when rendering at specific zoom level.
We traced back the issue to the bitmap font tables being preserved when subsetting fonts. When turning Text Smoothing option to “For Monitor” or “For Laptop / LCD Screen”, the issue disappear. To add bookmarks, you must first create a single pdf file containing all. Adobe Acrobat, both the Standard version and the Professional version, will create bookmarks. Night mode - Night mode supported for long time reading to comfort eyes. PDF Reader ProLite Edition 2.7.4: READ Reading modes - Multi-tab viewing, full-screen, page-fit, horizontal / vertical orientation, auto flow Presentation - Slideshow Mode to present your PDF as PPT. The free version, Adobe Acrobat Reader, does not create bookmarks. PDF Reader ProLite Edition, free download.
ADOBE PDF READER FOR MAC SET BOOKMARK SOFTWARE
Same text rendered at different zoom levels Rendering at 100%: Characters look good Rendering at 106%: Some Characters are invalid / funny / garbage / incorrect To create bookmarks using Adobe software, you will need a version of the software that provides this function. Text Smoothing Preference in Adobe Reader This is more noticeable when using the mouse to zoom. When the Rendering Preference under Page Display for Text Smoothing is set to “None”, Adobe Reader seems to be having issue when rendering certain embedded fonts (true type font for instance) at certain zoom level. We first thought this was an Adobe bug but looking further into this issue, we found out that it was an issue with bitmap font tables being preserved by jWordConvert when subsetting fonts. We found today a weird issue in the way Adobe Reader DC and Adobe Acrobat render some embedded fonts at certain zoom level.
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