Clipman

Clipman is a clipboard manager for XFCE. There is also a plugin for it that can be used to integrate it into the XFCE Panel.

To install Clipman and its panel plugin:

$ sudo apt install xfce4-clipman-plugin

I like to have Clipman plugin always around in my Panel. To do this, right-click on the Panel, choose Panel -> Add New Items and add Clipman.

Some of its settings that I configure:

• Increase the number of copied items in history

• Enable sync selections. This connects clipman to the default X11 clipboard. If not, only stuff you explicitly copy can be explicitly pasted. Middle-click to paste will not work as expected.

• Choose to paste instantly on Shift + Insert. This means that when I click on an item in history list, it is directly pasted into my last focused application.

Tried with: Clipman 1.2.5-1 and Ubuntu 14.04