William Sommerwerck wrote:
An electronic manual should actually be easier to traverse than a paper
manual, because there are no restrictions on page size or color. A bus or
rail can have a distinctive color that makes it easy to trace.

But you also need tools that are *intended* for this sort of use!
E.g., you "read" a schematic very differently than you read a
book! You often want to (rapidly and easily) flip between
several different places *on* a sheet and *between* sheets.
So you could have the source of a signal and (one) of its
loads, etc.

It seems like this is tedious, at best, using tools that
are intended for "general purpose documents".

Ideally, you should be able to open several windows into the
same document, resize them at will and maybe even *easily*
bind them to "hotkeys".

So, if you have a large virtual desktop, you could spread those
windows out across your desktop and just see the parts of the
schematic that are of interest to you AT THIS MOMENT.

Or, if you have a small desktop, you could position your fingers on
those "hot keys" so that you could easily flip between their
corresponding windows without having to take your eyes off
the screen (or shift your concentration away from the document)