In the past I have been able to use the "Show on FamilyTree" button from the FamilySearch Person Tools (the page which shows my RootsMagic person on one side and my FamilySearch person on the other side).
Currently this is not working, the URL which it generates of the form
https://familysearch...person=XXXX-YYY(where XXXX-YYY is the desired ID)
switches in browser to URL form like
https://www.familyse...dscape/XXXX-YYY(where XXXX-YYY is my own ID)
Instead of showing the specific person page as I desire, it shows a landscape tree with me (not the desired person)
I don't know where the URL formats are defined, but an example of "person" URL which always works for me is
https://www.familyse...etails/XXXX-YYY(where XXXX-YYY is the desired ID)
Note: I probably haven't used this feature for 1-2 months, so don't know when behavior changed. FamilySearch Central no longer seems to display version but RM is 188.8.131.52
P.S. My workaround is that I can use the button on the far right to copy FSID to clipboard. I have to move the window left because for long time the FamilySearch Person Tools window always opens with the rightmost portion off the right edge of the desktop (the minimize button can be seen but the maximize and x and the Clipboard icon and Close button are off the right edge until I drag the window leftward).