Start print heights: Print starts at the height defined by the user. Skirt/Birm/Raft should be automatically disabled If Start print height is enabled
Stop print height: Print stop at height defined by the user and home X and Y-axis to prevent damage print from hot nozzle
I did a quick search but couldn't find anything related to this other than the ColorPrint Prusa website
This feature is available using the ColorPrint. It will be much better if it is integrated to PrusaSlicer.
Start print heights: Print starts at the height defined by the user. Skirt/Birm/Raft should be automatically disabled If Start print height is enabled
For what purpose?
Stop print height: Print stop at height defined by the user and home X and Y-axis to prevent damage print from hot nozzle
This feature is available using the ColorPrint. It will be much better if it is integrated to PrusaSlicer.
Already implemented.

Start and stop print at user-defined height.
Start print heights: Print starts at the height defined by the user. Skirt/Birm/Raft should be automatically disabled If Start print height is enabled
Is this to print on top of something?
Just use your favorite text editor and erase all the lines (after head-gcode) up to your desired Z-value.
Or, you could "add custom G-Code"-marker and then erase/mod/replace up to there with a custom post processing script.
For what purpose?
Recovering failed print [Filament clog, power failure....]
Already implemented.
Sorry I didn't saw it. I was using PrusaSlicer-2.1,1.
Is this to print on top of something?
Just use your favorite text editor and erase all the lines (after head-gcode) up to your desired Z-value.
Or, you could "add custom G-Code"-marker and then erase/mod/replace up to there with a custom post processing script.
I know it's possible that way. But It will be super simple to do that if there is an option like this

I second this. It is reasonable and useful.
This feature is very useful, they could be implemented in a furuta version. It is very bad to change the GCODE manually. I look forward to this resource.
Most helpful comment
I second this. It is reasonable and useful.