The visualization palette is used to control lights and cameras. It is not available if…
Vectorworks Tip #071 – Visualization Palette to Edit Lights
The Visualization palette allows you to edit the lights directly from the palette. Right click on the light in the Visualization palette, then choose Edit… This will open the settings where you can edit the light. This means that you do not need to changes layers or classes to look for the light. Editing the light directly from the Visualization palette is the quickest way to edit the lights.