I agree, I also had suggested this 
Because I would like to have in many situations a comparison of before and after changing several attributes.
EXAMPLE:
Today I have several settings of forces, which I would like to compare against each other:
To set them up I need to change only 4 attributes.
But as soon as I change only one attribute, the recalculation begins.
- this is also a waste of time
Then I stop it with escape and my current "before" simulation is gone.
- no chance to compare
So currently the only chance to compare, is only with a lot of screenshots which is quite bad.
Because I would like to have in many situations a comparison of before and after changing several attributes.
EXAMPLE:
Today I have several settings of forces, which I would like to compare against each other:
To set them up I need to change only 4 attributes.
But as soon as I change only one attribute, the recalculation begins.
- this is also a waste of time
Then I stop it with escape and my current "before" simulation is gone.
- no chance to compare
So currently the only chance to compare, is only with a lot of screenshots which is quite bad.