To make your life easier, we have some keyboard shortcuts you can use within the Visual Editor:
Grid Mode & Design Mode
Control + L = Opens/Closes the Layout Selector
Control + S = Save (can also use Command + S on a Mac but Control + S works on a Mac too)
Design Mode Only
Control + I = Turns inspector on/off
Control + E = Opens the Live CSS Window
Grid Mode Only
Control + P = Hide/show bottom panel