Switches the visibility of two layers (Back/Front) at the same time

Switch Both Layers.lua

-- Switches the visibility of the active layer, if the layer is called
-- "Something Back" or "Something Front", it will try to switch the
-- visibility of the other layer "Something Back/Front" too (so you
-- can switch the visibility of two layers at the same time).

local layer = app.activeLayer
if not layer then
  return app.alert "There is no active layer"
end

local name1 = layer.name:match('^(.+) Back$')
local name2 = layer.name:match('^(.+) Front$')
local otherLayer = nil

if name1 then
  otherLayer = layer.sprite.layers[name1 .. " Front"]
elseif name2 then
  otherLayer = layer.sprite.layers[name2 .. " Back"]
end

-- Customize this action in case that you want to do something
-- different on the active layer (and its Front/Back counter-part)
local function modifyLayer(l)
  l.isVisible = not l.isVisible
end

-- Do something in the active "layer" and in the "otherLayer"
modifyLayer(layer)
if otherLayer then
  modifyLayer(otherLayer)
end