The Layer Page Selection Buttons toggle between the controls for each Layer in a Patch.
The LINK Button makes it possible to lock the controls of both Layers together. When enabled, any parameter changes made in one Layer will be mirrored in the other.
The LINK Button will highlight when it is enabled, to indicate that the Layers are linked.
When the LINK Button is disabled, changes made to Layer parameters will only affect the selected Layer.
For example, if you select Layer A and enable the Link Button, moving the Timbre slider on Layer A to the far left will cause the Timbre slider on Layer B to also move to the far left.
NOTE: Layer On/Off, Pan, Level, Transpose, Coarse Pitch and Fine Pitch are not linked when linking layers.