Background.
Its normally the "Background" layer. This will normally be the original picture loaded in and is replicated to a new layer to allow the user to work on a copy rather than the original
Flattening puts all the laysers on the lowest layer and removes empty layers., any floating selection will be anchored and moved to the bottom of the layer stack.
To unlock layer press padlock icon on top of layers stack on LAYERS palette, when padlock icon on right side of layer is gone do what you want to do with that layer.
The principle of superposition states that in an undisturbed stack of rock layers, the oldest rock layer will be at the bottom, while the youngest will be towards the top. This principle is fundamental to relative dating in geology.
If the pictures are in order with the most recent on top, then the stack would represent the layers found in rock formations.
It is called Superposition.
To successfully stack a 3-layer cake, start by placing the bottom layer on a flat surface. Spread a layer of frosting on top, then place the second layer on top of the frosting. Repeat with another layer of frosting and the final cake layer. Use a cake board and dowels for support if needed. Finish by frosting the entire cake for a polished look.
you stack them and on top of every layer stick them down with glue and at the very bottom the fondation should be cardboard
A double stack magnum is a needle arrangement that consists of a bottom layer of needles lined up tightly in a row with a second stack of tightly lined needles on top of the first. The layers have different numbers of needles in them. Common double stack magnum sizes are 5, 7, 9, 11, and 15. The bottom layer has one more needle than the top, so a 5 mag would have three needles with 2 laying on top.
To stack a 3-layer cake for a professional and stable presentation, start by placing the bottom layer on a cake board or serving plate. Spread a layer of frosting on top, then add the second layer. Repeat with frosting and the final layer. Insert dowels or straws into the cake to provide support, then chill the cake before serving to help it set and stay stable.
In Photoshop CS5 U can create 3D object or use layers to achieve 3D look. Duplicate and nudge every above or below layer in the stack.
The oldest rock layer is typically found at the bottom of a sequence of sedimentary layers, following the principle of superposition in geology. This principle states that in an undisturbed sequence of rock layers, the oldest layer will be at the bottom and the youngest at the top. Therefore, the rock layer closest to the Earth's surface is usually the youngest, while the rock layer at the bottom is the oldest.