[Hollywood]

The filter translates mouse events according to a set of translation rules. Unless you're very picky or something, you would never need to mess with the Mouse translation. An example would be:

# Syntax is:
# incoming-type [type-specifics] TO outgoing type [type-specifics]

#
# Simulated mouse buttons on the keyboard
#
#KEY modmask modvalue button label symbol TO BUT buttonnumber
KEY 0x0004 0x0004 0xffff 0x000d 0xffff TO BUT 1 # Alt-Enter
KEY 0x0004 0x0004 0xffff 0x0020 0xffff TO BUT 2 # Alt-Space
KEY 0x0004 0x0004 0xffff 0x0008 0xffff TO BUT 3 # Alt-BackSpace

#
# Keyboard-Mouse on the Cursors
#
#KEY modmask modval button label symbol TO REL axis value
KEY 0x0004 0x0004 0xffff 0xe034 0xffff TO REL X -5 # Alt-Left
KEY 0x0004 0x0004 0xffff 0xe035 0xffff TO REL X 5 # Alt-Right
KEY 0x0004 0x0004 0xffff 0xe032 0xffff TO REL Y -5 # Alt-Up
KEY 0x0004 0x0004 0xffff 0xe033 0xffff TO REL Y 5 # Alt-Down

#
# Keyboard mouse on the Numpad
#
KEY 0x0004 0x0004 0xffff 0xe231 0xffff TO REL X -5 # Alt-Num1
KEY 0x0004 0x0004 0xffff 0xe231 0xffff TO REL Y 5 # Alt-Num1
KEY 0x0004 0x0004 0xffff 0xe232 0xffff TO REL Y 5 # Alt-Num2
KEY 0x0004 0x0004 0xffff 0xe233 0xffff TO REL X 5 # Alt-Num3
KEY 0x0004 0x0004 0xffff 0xe233 0xffff TO REL Y 5 # Alt-Num3
KEY 0x0004 0x0004 0xffff 0xe234 0xffff TO REL X -5 # Alt-Num4
KEY 0x0004 0x0004 0xffff 0xe235 0xffff TO BUT 1 # Alt-Num5 - Button
KEY 0x0004 0x0004 0xffff 0xe236 0xffff TO REL X 5 # Alt-Num6
KEY 0x0004 0x0004 0xffff 0xe237 0xffff TO REL X -5 # Alt-Num7
KEY 0x0004 0x0004 0xffff 0xe237 0xffff TO REL Y -5 # Alt-Num7
KEY 0x0004 0x0004 0xffff 0xe238 0xffff TO REL Y -5 # Alt-Num8
KEY 0x0004 0x0004 0xffff 0xe239 0xffff TO REL X 5 # Alt-Num9
KEY 0x0004 0x0004 0xffff 0xe239 0xffff TO REL Y -5 # Alt-Num9

#
# Home the cursor ...
#
KEY 0x0004 0x0004 0xffff 0xE038 0xffff TO ABS X 0 # Alt-Home
KEY 0x0004 0x0004 0xffff 0xE038 0xffff TO ABS Y 0 # Alt-Home

#
# Invert mouse axis
#
#REL modmsk modval axis TO REL axis multiplier
REL 0x0004 0x0004 X TO REL Y -1
REL 0x0004 0x0004 Y TO REL X -1

#
# Accelerate mouse
#
# multiplier treshold higher-speed
REL 0x0004 0x0004 X TO REL X 1 5 4
REL 0x0004 0x0004 Y TO REL Y 1 5 4

#
#
# Invert mouse buttons
BUT 0x0004 0x0004 1 TO BUT 2
BUT 0x0004 0x0004 2 TO BUT 1