What is this hidden Unity window-dragging feature I discovered on accident, and how do I reproduce it?

Solution 1:

These are the grab handles which make moving and resizing windows in Ubuntu easy.

You can produce this by middle clicking on a window. On a laptop this is usually done by one of the following methods depending on your trackpad / mouse.

1) Tapping / Clicking with three fingers and dragging if using a multi-touch trackpad.

2) Clicking With both the right and left mouse buttons at the same time and dragging.

3) Clicking with the middle mouse button if using an external mouse and dragging.

Really just anything that simulates a middle click and then a drag. It might vary depending on your configuration but one of those should work.

Solution 2:

In ccsm you can find unity mt grab handles. You can set up your shortcut there:

Configuration for the feature is found here:

• How do I use Unity drag handles?