-h-help
       Show summary of options.

-display DISPLAY
       The X display to connect to.

-border N
       The width of the border to put around the system tray icons. Defaults to 1.

-vertical
       Line up the icons vertically. Defaults to horizontally.

-wmaker
       WindowMaker  mode.  This  makes  docker  a  fixed size (64x64) to appear nicely in in WindowMaker.
       Note: In this mode, you have a fixed number of icons that docker can hold.

-iconsize SIZE
       The size (width and height and height) to display icons as in the system tray. Defaults to 24.

-color COLOR
       The background color to use for the tray. Defaults to whatever color the window manager specifies.