To change elevation of a door in your design, you can follow these steps:
Click on the door that you want to modify to select it.
In the left panel of your design interface, you will see the "Dimensions" option.
In the Dimensions section, you will find the field elevation.
Select the reference of from which point you want the elevation value to be considered - Floor Base Top, Floor Bottom, Floor Top etc.
Input the value in mm the elevation of the door you want to revise.