How can I get Plank and Wingpanel on both monitors without Mirroring Screens

Question

I would like to get Plank and Wingpanel on both screens of my dual monitor set up without mirroring my screens. How can I do this?

Answer 1

Plank (Buttom Dockbar):

It's really easy to mirror plank to more than one screen.

• Make sure that dconf Editor is installed:
  sudo apt-get install dconf-tools.

• Convert existing dock into dock1 and add dock2, dock3 .. :
  cd ~/.config/plank & mkdir dock2 dock3 ..

• Copy settings files:
  cp dock1/settings dock2/ & cp dock1/settings dock3/ ..

• Link icons form dock1 to dock2,..:
  ln -s dock1/launchers/ dock2/launchers & ln -s dock1/launchers/ dock3/launchers ..

• Identify monitor IDs:
  xrandr | grep " connected"
  Output: eDP1 DP1-2 DP1-3 ..

• Set monitor for dockX:
  sudo nano dockX/settings
Monitor= eDP1/DP1-2/DP1-3/..

• Apply settings to pantheon:
  Apps -> dconf Editor and org -> pantheon -> cerbere
  Replace '..plank..' with 'plank -n dock1 & plank -n dock2 & plank -n dock3 ..'

Sources:
Fun tip: Have plank run on multiple monitors!
Dual docks in elementary OS

Wingpanel (Top Systembar):

Update: There is a ported version of autohide available here, WingPanel » Add optional hide mode.

Bug #1237228
It should be an option to have wingpanel placed on multiple monitors. >
Perhaps the monitor number could be specified through a command line argument so that any combination of instances/monitors could be achieved.

Other customizations:

How to install wingpanel-slim or super-wingpanel on elementary 0.3 Freya (amd64)?
Both wingpanel-slim and super-wingpanel were developed and maintained by a developer on Launchpad called ~heathbar. Unfortunately, it looks like he abandonded both projects and did not update them to work with Freya (last change to wingpanel-slim was 2013-11-19, last change to super-wingpanel was 2014-03-04).

Therefore, sadly, there is (currently) no way to use one of those on Freya. Maybe development will be resumed by someone else, but at this very moment, it's simply not possible.

(Freya) Make Wing-panel Clear
Install dconf editor (sudo apt-get install dconf-editor)
In dconf-editor: org>pantheon>desktop>wingpanel
Unselect auto-adjust-alpha and set background-alpha to 0.0. Done :)

Answer 2

Heath Paddock has since release an application called multiplank that does the configuration automatically.

To install the app from his PPA:

sudo apt-add-repository ppa:heathbar/multiplank sudo apt-get update sudo apt-get install multiplank

Once installed, enable multiplank by issuing the following command:

multiplank -e

And to disable:

multiplank -d

Answer 3

I don't know about Wingpanel, but Heath Paddock wrote this tutorial for Plank. https://heathpaddock.com/?p=761