By default, the right mouse button is bound to the "menu pop-up" action, i.e. clicking the right mouse button anywhere in the KTimemon window brings up a menu, which is discussed in the following sections.
The Help Menu is fairly conventional. Chances are good you already discovered this functionality.
The Settings... Menu is used to pop up the configuration dialog. Configuration options are discussed in section Configuration.
By selecting the Docked In Panel menu, KTimemon switches between its standard display (i.e. a normal window) and the panelised state, where the KTimemon window disappears and a smaller version is displayed in the system panel. Apart from the reduction in size, the "panelised" KTimemon behaves exactly like its big brother.
By selecting the Horizontal Bars menu entry, KTimemon switches from vertical bars to horizontal bars and vice versa. Not very useful, but it was easy to implement ;-)
The Quit menu - surprise, surprise -- is used to terminate KTimemon. It will save the current state (e.g. the colour scheme, window size, whether it is displayed in the panel) and restore the state in the next invocation.
The configuration information is saved in the file $(HOME)/.kde/share/config/ktimemonrc, where $(HOME) refers to the user's home directory. If this file is deleted, KTimemon will start in its default state in the next invocation.