Keyword: ltvis
The ltvis button in the top button menu toggles display of the layer table. As the layer table occupies significant screen area, it is sometimes useful to get rid of it to enable a larger main drawing window.
Much of the functionality of the layer table is found in the layer palette which in some ways is like a ``mini layer table'' containing only a few chosen layers. Even without the palette, one can switch the current layer using the layer search capability, or the setcl button, both found in the top button menu.