When using VST synths like Dim Pro, Rapture, Z3TA + and you first adjust the level and after you listen to a program, I really can't understand why if you want to discover the sound of a different program you have every time to adjust the level of the new program.
Why is it not possible that, once you have set the general volume, all the programs have to be heard at the same level?
Only happens to me? And you guys?

Maybe, if you rephrase your question and explain better, if possible including screenshots, this might generate a better understanding.

The best solution that I have found is to make a project file with all synths setup in it. Then make a new project templet. Each time you want to work with synths just use that templet. After a bit of time you will learn your go to synths and things will move faster. :)

Basically it's about the fact that different patches on any synth be it hardware or software are seldom balanced for volume.
 
One minute you have to turn up the volume on a quiet patch then the next patch blows your speakers up!
 
The best solution is to go through each patch, adjusting the output volume in the synth and then saving the patch.
 
Would be nice if more attention was paid to balancing patches by the manufacturers!