https://www.youtube.com/watch?v=CkpfC56u_ak

You can easily change a range of parameters which were assumed to be locked in.
Using only DJI's own Assistant program.
I have increased the (Sports Mode) rate of ascent and descent.
There are also legitimate reasons to want increased altitude in hilly areas without going dangerously high above ground level.

Works on most DJI quads but may need older firmware for some items.