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Go Back and Forth Fast in Preview

If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.

The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).

 
 
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Compression II Details

Copyright (c) 1991 Ken Hancock & Adam C. Engst DiskDoubler Salient Software, Inc. 124 University Avenue, Suite 103 Palo Alto CA 94301 415/321-5375 SALIENT@applelink.apple.com Salient on AOL Suggested Retail: $79.95 MacConnection price: $49 Overall rating: 9 penguins out of 10 SuperDisk! Alysis Software Corp. 1231 31st Ave. San Francisco, CA 94122 415/566-2263 Alysis on AOL Suggested Retail: $89 MacConnection price: $49 Overall rating: 7 penguins out of 10 Well, it's long-past time for yet another TidBITS compression article (YATCA?)Show full article

DiskDoubler

Installing DiskDoubler is easy. Simply double-click on Salient's installer application and it automatically installs the DiskDoubler files, including the application, the extension, and the help fileShow full article

SuperDisk!

Installing SuperDisk! is equally as easy as installing DiskDoubler. If you're running System 6.0.x, simply drag the SuperDisk! Control Panel into your System FolderShow full article

Where They Differ

Although DiskDoubler and SuperDisk! both serve the same function, how they approach the task differs. When you compress a DiskDoubler file, you'll know it's compressed right away - the icon for the document or application that you just compressed turns into a DiskDoubler iconShow full article

Program Speed

(aka "The Bottom Line") One of the fundamental problems with compression is a trade-off between time versus space. If you spend more time trying to compress a document, you can usually do a better jobShow full article

Speed Tables

comp(s) decomp(s) size % saved Text (single file - 342K) SuperDisk! tight 3.5 2.7 278 18.71 SuperDiskShow full article

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