Placing components at specific elevations has been tedious for quite some time because instead of providing a way to set an elevation/offset value first we have had to place first and fix the elevation second. For example an air terminals that are not hosted or face based end up on the floor. Equipment families end up on the floor too.
With the introduction of the modeless (techy one word for “it can always be open“) Properties Palette we can see the elevation value and set it first! A video is more fun? Embedded below: