Preferences
Three panes of settings covering time formats, shortcuts, and window behavior.
General

Time Format
Select from a variety of time formats, from simple minutes and seconds to hours, minutes, seconds, and fractional seconds. The chosen format is also used in the lap window, the lap drawer, and when exporting or printing lap times.
Timer Color
Sets the color of the clock digits in the digital view.
Background Color
Sets the background color behind the clock in the digital view.
Always Reset Timer On Start
Resets the clock to zero every time you press Start, instead of continuing from the most recent time.
Enable Reset While Running
Keeps the Reset button enabled while the timer is running. In this mode, the timer snaps back to zero and continues running when Reset is pressed.
Always Start From Most Recent Lap Time
When enabled, the timer is set to the most recent lap time every time it is started.
Shortcuts

Shortcuts
Record keyboard shortcut combinations for the stopwatch actions — Start, Stop, Lap, and Reset. Shortcuts can include modifier keys or single keys on their own.
Start Also Triggers Stop
When enabled, the shortcut for Start also triggers Stop — so one key toggles the timer between running and stopped.
Make Shortcuts Local
When enabled, shortcuts only work when Stopwatch Pro is the foreground application. Otherwise, shortcuts are global and will work even if Stopwatch Pro is in the background or another app is focused.
Window

Window Opacity
Adjusts the opacity of the various windows of Stopwatch Pro, letting you fade the timer into the background of your workspace.
Always On Top
When checked, the stopwatch and lap windows float on top of other application windows so the time is always visible, no matter which app is focused.