The Calrec handbook uses Swiftview to view circuits and schematics.

When a circuit, CAD drawing or document is clicked, it is opened in the main window using the Swiftview plugin. The swiftview window has a button bar on the right hand side with the following buttons:

  Show entire page
  Use full window width
  Rotate Clockwise
  Print Document
  Help
  Previous Page
  Choose Page
  Next Page

There are also the command keys:

 Ctrl-F- Search for a text string (not on circuit diagrams)
 Ctrl-G, F3- Goto next occurance of search text
 Ctrl-C, Ctrl-Insert- Copy select text to clipboard
 Arrows- Pan left/right/up/down
 Page Up- Previous screen
 Page Down- Next screen
 P- Previous page
 N- Next page
 F, Home- First page
 L, End- Last page
 I- Zoom in
 O- Zoom out
 A- Draw entire page
 W- Fill window with top of page
 Ctrl-P- Print document

and the following functions:

 Zoom in:Press left mouse button, move mouse and release
 Select text:Press Alt key and left mouse button, move the mouse, and release
 Change Pages:Use vertical scrollbar, toolbar page control, or a command key
 Cancel mouse action or selection:Press right mouse button