This dialog provides controls related to pad or via settings for each layer, including shape, size, and X/Y location. The dialog caption and the available controls will change, to reflect which object (pad or via) that you came from.
The same dialog is used for both pads and vias, the dialog caption and options will change to reflect which object you came from.
Main Grid - A pad stack is a collection of pad information about the pad shape and size relative to a layer of this stack. Click on one of the attributes on this grid to edit the values for the current layer of the stack. The layers of a pad stack are derived from the Layer Stack Manager dialog (Design » Layer Stack Manager).
Attributes on Layer
Layer Stack Reference
Only show layers in layerstack - Enable this option and the layers (derived from the Layer Stack Manager dialog) in the Layer Stack are displayed only. Check the Layer Stack Manager dialog (Design » Layer Stack Manager) to see which layers are used. If this option is disabled, all the available PCB layers are displayed.