Datasheet

142 Layers and Masks
To make a mask or blend apply to only specific layers, i.e. those that
contained within a group.
To apply changes to a group that you would otherwise have to apply to
each layer in turnthus improving efficiency.
In reality a group is really just another layer but one which can store layers
within itself. It’s not surprising then that a group can have its own blend mode,
opacity and blend ranges just like a layer. A group can also be merged and made
visible/invisibleor even grouped within another group.
To create a Layer Group:
Select a layer to set the position in the layer stack in which you want to
place the Layer Group.
Choose the New Layer Group button (or select New Layer
Group... from the Layers menu).
In the dialog, enter group name, blend mode, opacity, and blend range
for the group.
Click OK.
To add one or more layers to a Layer Group:
Select the layer(s) you want to add to the group and drag onto the
group name. The layer(s) will then appear indented under the group.
To remove a layer:
To remove the layer(s), drag the layer away from the group and drop it
into an ungrouped area of the Layers tab (a red line indicate where the
layer is to be placed). You can also use Ungroup Layers from the
Layers menu if all layers are to be removed.
To merge a Layer Group:
To flatten the layer group, select the group and choose Merge>Merge
Layer Group from the Layers menu.
You cannot move the Background layer to a group.