Slow Green
Since it is considerably slower, it will be difficult for you to get a sense of distance.
If you trust the figures provided by this web app and putt the ball, you will be able to handle it.

Medium Green
This is the green speed reading for a general golf course.
Green speed in the 9-feet range is the easiest to putt, while 8-feet greens are the slowest among medium green. Believe in the values from this web app and putt it.

Fast Green
This is comparatively faster than the above two.
11 or 12 feet is a speed at professional level. You can rely on the values provided by this web app.

Stride length can be selected in 5cm increments.
When using a laser rangefinder, select 90cm for yard display and 100cm for metric display.
If you have a short stride length, when you use a laser rangefinder and walking measurement, use a large step, or increase the number of steps by about 10%.
*To get an accurate stride length, measure 10 meters and divide by the number of steps.

Normal golf courses use Wide.
Select Narrow when the slope of the green is not so steep on all holes on a plain or riverbed of the golf course.
*Since wide and narrow are the widths of the slope distribution area, the difference in ball speed values will be larger for wide and smaller for narrow.

The ball speed display is based on the ball speed (m/s) after impact taken using a measuring device, but if the distance reached by your putting stroke does not match the ball speed, you can adjust it here.
For example, if the green speed is at 9 feet, the ball speed "2" is 7 meters.
If your putting stroke at “2” is 10m, adjust the speed of the ball to 140%.
The original ball speed at "3" is 12m, but under this setting it is 15m.
This way, you can adjust the settings according to your putting stroke.
*This setting can be set to its default value by setting it to 100%.

The ball speed display can be chosen between simple and detailed.
The simple display shows ball speed in increments of 0.3, 0.5, and 0.8 between whole numbers, making it easy to distinguish distances between ball speeds 1, 2 and 3.
*The detailed display is for golfers who have mastered controlling golf balls at various speed with a measuring device and want to bring out a delicate sense of distance.