Thanks for the reply! Good news: DEM changed, but not like i expected

I subtracted the needed value from the DEM. After re-importing it seemed that the values changed, but also the scale changed dramatically in Agisoft after re-importing (it is not good for visualization). When my lowest value should be 0 now in the DEM, why is the lowest value of the scale now -8.37 m which is exactly the value i subtracted from the DEM.
You can see in the picture i attached, how it look now
greetings toffersan