Some or most of you will know this already.
If you right-click on a callsign in the beacon list and chose "callsign history", you can see the entire list of beacon loggings over time (limited to the past 90 days).
In the example below you can see that DL1MF improved from -13 dB SNR to -6 dB over about 45 minutes on 13th March 19:41 to 20:26Z.
73
Dieter, VK3FFB