Stack list

Using the Stack list, you can create complex effect built up of multiple individual filter effects.
The Stack list is divided in three columns; the leftmost column is the enable column. The second column is the layer type column. The third column shows the filter effect name.

1. Layers

The Stack list uses a layers concept similar to Photoshop and other graphics applications. Each filter effect in the Stack list is a layer and, depending on the type of layer it is, will be mixed in different ways with the original image. There are three types of layers:

• Background
  The background layer is the bottom-most layer. Typically this will be the source image, but you can also choose to set it to a specific color or transparency. This layer is not configured in the Stack list but in the Options.

• Source
  A source layer takes the original source image as input for the filter. You can have multiple stack layers in each source layer which filter a source layer further. Using multiple source layers you can apply multiple effects to a source image and mix them together.

• Stack
  A stack layer takes a previous layer as it's input. A stack layer is always part of a source layer, you cannot have a stack layer on it's own. If a stack layer is preceded by a source layer, it will use that layer as input. If it is preceded by another stack layer, it will use that. This way you can chain multiple effects together and create complex effects.

You can switch between the type of layer (either source or stack, because background layer isn't configured in the Stack list) by clicking on the second column. Alternatively you can also switch layer type by clicking on the filter name with the right mouse button or by holding either of the "Ctrl" keys on the keyboard whilst clicking with the left mouse button. The first (top-most) layer is always a source layer and cannot be changed.

Note! The layers in UnPlugged-X are ordered differently from most graphics applications; the first layer to be rendered is at the top. All subsequent layers are applied on top of the previous layer. In Photoshop, for instance, the first layer is at the bottom of the layers list.

2. Enable

You can enable/disable a single layer (in the case of stack layers) or a source image and all stack layers based on that source layer. Do this by clicking on the leftmost (enable) column in the Stack list. The text "on" will switch to "off". To enable the layer again, just click it again.

3. Adding an effect

The "Add >>>" button at the top will add the currently selected effect (either in the Filter list or the Stack list, in which case a clone would be made) to the Stack list.

4. Buttons

The buttons on the right side help you manipulate the Stack list.

• Remove
  Clicking this button will remove the currently selected layer in the Stack list. UnPlugged-X will ask for confirmation first, to prevent accidental removal.

• Clear
  The "Clear" button will remove all layers in the Stack list. UnPlugged-X will ask for confirmation first, to prevent accidental removal.

• Up/Down
  The "Up" and "Down" buttons move the currently selected layer in the Stack list up or down. Please note that only individual layers will be moved. If you try to move a source layer, all stack layers belonging to it will not be moved.

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