In this chapter from the ExtremeTech book Hacking Ubuntu: Serious Hacks Mods and Customizations you'll learn about switching applications, tweaking the workplace switcher, customizing applications, using buffers, and tracking projects.
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Multitasking does not just mean running two programs at once. The definition encompasses your ability to switch between programs, communicate between applications, and find running programs. In the corporate world, it also means accountability: you need to be able to say how much time was spent on each project. Fortunately, Ubuntu has many options for addressing these needs.