MATLAB has keyboard shortcuts to switch to any of the different types of windows it displays. These shortcuts are hard-coded and cannot be configured or changed from the Preferences.
Some of the shortcuts I find useful are:
Ctrl + 0
Ctrl + Shift + 0
Ctrl + 3
Ctrl + Shift + 3
The full list can be seen at the bottom of this page.
Tried with: MATLAB R2014a and Ubuntu 14.04