sets the top and bottom padding (applies the specified value to both sides)
webix.ui({
view:"dashboard",
gridColumns:4, gridRows:3,
paddingY:20,
cells:[
{ view:"panel", x:0, y:0, dx:1, dy:1, body:{template:"Single"}},
{ view:"panel", x:1, y:0, dx:2, dy:1, body:{template:"Wide 1"}},
{ view:"panel", x:0, y:1, dx:2, dy:1, body:{template:"Wide 2"}}
// more cells
]
});