Clicking on the Render Tool launches the Renderer dialog.
Select the desired settings in the Control, Options, Settings, and Tracing tab pages of the Renderer dialog. Press the Render button at the bottom of the Renderer dialog to start rendering. Note that test renders be done quicker using the File-> Quick Render (F12).
The renderer defaults to a Scanline Phong renderer. Various levels of Ray tracing can be enabled in the Tracing tab page. Phong rendering is suggested in most cases since ray tracing is notoriously memory and time intensive.
The renderer is multi-threaded and will benefit greatly if additional processors are installed in the system. Rendering on a two processor system will almost be twice as fast as with one processor.