Basic Navigation and Offline Browsing
Getting around in HyperLink
If you have used HL2.0, HL2.5 is identical except for additional keyboard
HyperLink is not really a document viewer at all, but instead an interpreter
for a programming language called LinkScript. The HLPP proxy used for web
browsing converts HTML into LinkScript for HyperLink to execute. When you
view HyperLink pages, you are really running small programs that tell HyperLink
what to display.
Here is a screenshot of HyperLink showing a typical document. At the
top of the screen is a button bar; your pointer is in the upper left quadrant;
and two scroll icons are on the left.
The document text and any inline images (only in offline documents) appear
in the text area. Like web browsers, some portions of the text area may
be clicked on. These areas are the same colour as the pointer and scroll
icons. These portions of text will link you to other documents, which may
be online or offline. If you click on a Web URL starting with http://,
HL2.5 will automatically try to connect to the Internet if you are not
presently connected. Refer to the section on "Browsing the Web with HyperLink".
The scroll icons allow you to scroll through the document. Because you
are really executing a small program, they act more like stop and run commands.
The scroll down icon continues the document, functionally displaying the
next page. The scroll up icon starts the document from the beginning (for
technical reasons, it is not possible to scroll backwards without starting
The five icons on the button bar are identical to those in HL2.0 and
are as follows:
As in HL2.0, all of the buttons (except the about icon) have short-cut
keys. Press F1 for help, F3 to open a document (registered users only),
F5 to go home and F7 to back up. Thus, to run a HyperLink-based application,
just insert the disk and press F5; to get immediate online help, just press
The green back arrow takes you to the last document you visited before
this one. HL2.5 remembers a chain of up to ten documents.
The light blue opening folder icon allows you to enter a filename or URL
to open. This option is only valid for registered users. Users of the
unregistered evaluation version cannot enter filenames or URLs directly,
but may only click on links. If you enter a filename of a LinkScript
file, the lnk. prefix will be added for you automatically. If you
enter a Web URL starting with http://, HL2.5 will automatically
try to connect to the Internet if you are not presently connected. Refer
to the section on "Browsing the Web with HyperLink". If you make a mistake,
you can press F7 to cancel.
The grey home icon takes you to the home script on the current disk. This
allows you to launch applications written for HyperLink just by inserting
their disk and clicking the home icon. When you go home, the history of
places you have visited is cleared, but your connection to the Internet
is maintained if you are currently connected. To go back to the HyperLink
home page, make sure the HL2.5 disk is in the primary disk drive and click
the home icon.
The white Computer Workshops diamond icon takes you to the information/about
script on the current disk. This allows you to get information about the
scripts on the disk you're using. To view the HyperLink credits and information
page, make sure the HL2.5 disk is in the primary disk drive and click the
about icon. To go back, just click the back icon to return to the document
you were originally viewing.
The pink question mark icon takes you to the online help facility on the
current disk. This allows you to get online help with the disk you're using.
To view HyperLink's built-in manual, make sure the HL2.5 disk is in the
primary disk drive and click the help icon. To go back, just click the
back icon (repeatedly if needed) to return to the document you were originally
HL2.5 provides additional keyboard commands:
The = key (equals sign) displays the filename or URL of the document you
are currently viewing, and the ten documents in your history sorted from
most to least recently viewed (with 0 being the document you're viewing
now). Press F7 to cancel, or any number key to jump immediately back that
number of documents. Since 0 jumps you back no documents, it is effectively
the same as cancelling. If you are using HL2.5a, it will also display its
version number in the lower right corner.
The CTRL-COMMODORE key combination halts a network transfer. See the section
on "Browsing the Web with HyperLink".
The CTRL-R key combination reloads the current document. If the document
had been cached in memory, it is cleared from the cache and a new copy
The CTRL-K key combination toggles on and off system access to any script
you display. Refer to the section "Offline browsing with HyperLink".
If you see <Searchable> in the text area, the document is permitting
you to send it additional information. Press S to search or query the document;
if you make a mistake, you can press F7 to cancel. The document will tell
you what information it is requesting. Both online and offline documents
can be made searchable. (Note that until <Searchable> appears,
the document cannot yet be queried and the S key will be ignored. The program
displaying the document may have additional preparation to do first before
it will permit you to send a query.)
Offline browsing with HyperLink
HL2.5 is 100% compatible with HyperLink 1.0 and 2.0 scripts and applications.
To use any application designed for HyperLink, simply insert its disk into
your primary disk drive and press F5 to start its home script. Both the
unregistered and registered versions of HyperLink 2.5 can read and execute
any application designed for HyperLink without restriction.
Offline applications can display I3-format inline images, can accept
queries and may include their own built-in online help facilities. To view
the online help in the application, press F1. In addition, offline applications
can also execute external machine language programs to play music, do animation,
or even create entire documents on the fly.
To run a specific file on a disk (registered users only), press F3 or
click the open icon, and enter the filename. The lnk. prefix will
be added for you.
A note on security: Because offline applications are permitted
to install and run their own extensions, it is possible for an unscrupulous
programmer to use them to cause damage to your system. If you don't trust
the source of a script, you can use the CTRL-K key combination to toggle
on and off whether a script may alter memory or load its own extensions.
By default, these operations are allowed. Pressing CTRL-K once will disallow
these operations and the border will briefly flash red, and any scripts
that try to use active operations will display <Active> in the
text area when such commands are encountered. Pressing CTRL-K again will
again allow these operations and the border will briefly flash green. We
would like to stress that such programs are rare, if not non-existent,
and this measure is almost never needed; also, all of the scripts from
Computer Workshops are fully tested and may be enjoyed safely with these
operations enabled (the default).