Channel properties: On/Off, Dimmer
When you create new Scenes or Switches, you are given the option to "Link the Dimmer (or EasyStep) function to all channels of the page".
Selecting any of these options will assign that particular property to every channel of fixtures for that particular button.
If neither "Dimmer" nor "EasyStep" functions are selected, the channels will have the OFF property by default.
If a channel is OFF, the final output for this channel will not be affected by this particular scene/switch. For example, a COLOR switch has all of its channels in OFF, except for the COLOR channel, which is assigned a DIMMER property and a particular value.
DIMMER channels are fixed values within the scene/switch. For example, if you have an EasyStep scene, where the light beam fades in between positions and all gobos and colors are kept the same throughout the scene, you can assign these color and gobo channels the DIMMER property and set the constant value for this scene. This dimmer value will automatically be the same for all steps in the EasyStep scene.
ON channels are just like 100% DIMMER channels. However, we must emphasize that a 0% dimmer IS NOT the same as an OFF channel. An OFF channel does not affect the channel in question, whereas a 0% DIMMER assigns this value to the channel, which would replace any values coming from different buttons.