Collapses all open palettes, except command line and status bar, to a small bar displayed along the left or right side of the screen.
Access Methods
Menu: Tools 
Palettes Show Palettes as Icons Menu: Window Show Palettes as Icons Toolbar: On a palette, in the upper-right corner, click the Collapse as Icons/Show as Palettes button Shortcut menu: Right-click the title bar of a palette and choose Collapse as Icons (Left), Collapse as Icons (Right)
Summary
All open palettes with the exception of the command line and status bar are collapsed to an icon state. While icon state is active, each additional palette opened is added to the palette bar that is displayed along the left or right side of the screen.
Click a button on the bar to display the associated palette. The palette will remain open until you click the button again or click a different button on the palette bar. Use the PALETTEICONOFF command to return to palette state.