What is the best way to get hotspot point position accurately?

First thanks for this amazing tool to facilitate the VR play!

I was wondering the easiest way to apply hotspot on a pano. for example,

<point ath="-31.167381" atv="-26.721998" />

my question is how can I get these values easily? Can I just click the pano and then convert the mouse position to the above two values? Or is krpano providing the tool to obtain hotspot location easily?

This is extremely useful if hotspot is a polygraph, and then I have to get all the points' accurate position.

Thanks

It worked, but I have to put
keep="true"

in events