GitHubRulesOK

Which is easier to use and takes the minimal amount of screen space Bookmarks can be edited by the user without editing the master file contents How much slower are...

@SumatraPeter whilst many old file formats supported secondary / embedded thumbnails (possibly even multiple adaptive copies to interlace in turn) few tend to carry that extra baggage. PDF/CBX usually depend...

I am not misconstruing anything simply observing that in all likelihood the more graphics bloat you introduce over time the slower applications becomes, unless you force users to keep upgrading...

Later edit --- Experimental feature is now removed @Unknow0059 If you use a portable copy of [pre-release](https://www.sumatrapdfreader.org/prerelease.html) or daily and open a pdf that has no bookmarks (or even one...

@SumatraPeter I agree it is **very well implemented in Tracker products** and have used thumbnails in Word and hundreds of other graphics editors to increase productivity. Potentially benefiting thousands of...

@PolGZ you may note from the discussion above that there are lightweight alternative options to adobe such as okular or the advocated Tracker eXchange products until and IF thumbnails were...

@PolGZ Tracker will add watermarks to extended features and many users still rely on the older less commercial freemium "view" version which when installed used to be recognised by SumatraPDF...

@Tback1 PDF preview in Windows 10 is now so good that even I, don't use SumatraPDF or Tracker Previews (preferring them both to be portable rather than installed with previews...

you should be able to add your own externalviewer command for show file in X.eXe it's the keyway to open CHM or Acrobat or any other app with current page...

you will need to read the manual https://www.sumatrapdfreader.org/docs/Customize-external-viewers ver 3.6+: ``` ExternalViewers [ [ CommandLine = xyz explorer %d Name = open in %xyz folder Filter = Key = x...