By learning the keyboard shortcuts, it can be easier to navigate around the Developer Tools.
Chrome's keyboard shortcuts are listed in the settings menu, found by clicking the cog icon on the bottom right of the page. Pressing "Cmd" ⌘, Shift and / on Chrome will bring up the keyboard shortcuts list and also doubles up as a quick way to navigate to settings.
Internet Explorer's keyboard shortcuts are available online.
The shortcuts of the Firefox Developer tools are listed on MDN.
Opera's keyboard shortcuts are also found in the settings menu, found by clicking the cog icon on the right side of the docking bar.