The Standalone SVG Viewer

To browse and open any SVG file having the .svg or .svgz extension, use the Tools > SVG Viewer action. If the file is included in the current project, then you can open it by right-clicking it and selecting Open with > SVG Viewer. The following actions are available in a contextual menu:
Zoom in
Zooms in the image by a factor of 2. The action is also available on Mouse Wheel Up;
Zoom out
Zooms out the image by a factor of 2. The action is also available on Mouse Wheel Down;
Rotate
Rotates the image 90 degrees clockwise;
Refresh
Refreshes the image, by reloading the SVG file.
Note: When you open the SVG viewer, the active SVG is displayed.

Figure: SVG Viewer

Related information
SVG Rendering Issues