~/.wmdrawerrc is the default per-user configuration file. Here is a completely commented example.
# Config file example for wmdrawer
[general]
# Dock's icon [optional]
#dock_icon panel-drawer.png
# Drawer's opening direction [required]
# Top to bottom = 0
# Right to Left = 1
# Bottom to Top = 2
# Left to Right = 3
direction 2
# Image used for icons' background [optional]
#icons_bg defaultTile.xpm
# Allow icons' enlargement to fit them to buttons' size [optional, default 1]
# 0 indicate that icons should never be larger than their original size.
#icons_expand 1
# Activate the drawer's pseudo-transparency [optional, default 0]
# if you choose transparency, icons_bg will be ignored
#transparency 0
# dock's width: min=12, max=128 [optional, default=64]
#dock_width 64
# dock's height: min=12, max=128 [optional, default=64]
#dock_height 64
# buttons' size: min=12, max=128 [optional]
# Useful for the people who want for example to have big icons
# and to define several columns.
#btns_size 32
# Icon's highlight type: 0, 1 or 2 [optional, default 2]
# 0 : no highlight
# 1 : target (unavailable if transparency is activated)
# 2 : shading
#highlight 2
# Image used as highlight [optional]
# only used if you choice target type
#highlight_img highlight.xpm
# Tint icons by a specified color [optional, default #ffffff]
# only used if you choice shading type
#highlight_tint #ffffff
# Shade icons at a specified level [optional, default 60]
# only used if you choice shading type
#highlight_sh 60
# Display buttons' tooltips [optional, default 1]
#tooltips 1
# Tooltips' font [optional, default fixed]
#tooltips_font fixed
# Drawer's animation speed: 0, 1, 2, 3, 4 [optional, default 1]
#animation_speed 1
# Mouse cursor in drawer: 0, 1, ..., 76 [optional, default 30]
#cursor 30
# Auto opening of the drawer: 0, 1 [optional, default 0]
#show_on_hover 0
# Auto closing of the drawer: 0, 1 [optional, default 0]
#hide_on_out 0
# drawer's hiding timeout in milliseconds [optional, default 1000]
#hide_timeout 1000
# Runs the dockapp in windowed mode: 0, 1 [optional, default 0]
# Useful for AfterStep, Fvwm, Sawfish or KDE users.
#windowed_mode 0
# Instance name so window manager can distinguish between multiple copies
#instance_name distinguish_name
# Drawer's border size in pixels [optional, default 1]
#border_size 1
# Images directories
[images_paths]
/usr/share/pixmaps
/usr/local/share/pixmaps/
# A first column with 5 buttons
# Each button must be defined with this syntax:
# (tooltip) (image) (command)
[column]
(X Terminal) (gnome-term.png) (xterm -bg black -fg wheat)
(Galeon) (galeon.xpm) (galeon -s)
(Sylpheed) (sylpheed.png) (sylpheed)
(XChat) (xchat.png) (xchat)
(MPlayer) (gnome-multimedia.png) (mplayer)
# A second column with 5 buttons
[column]
(Xmms) (gnome-audio2.png) (xmms)
(Gimp) (gnome-gimp.png) (gimp)
(GQview) (gqview.png) (gqview)
(Xcalc) (gnome-calc3.png) (xcalc)
(GFtp) (gftp.png) (gftp)
Look at /usr/share/doc/wmdrawer/wmdrawerrc.example for a copy of this example.