This add-on is a huge time-saver, because it let's you render different settings quick and easy.

If you want to compare different settings for your renders, this add-on is your you! Just hover over input fields, press S change the value and press S again and repeat these steps as long as you like.

Of course you should keep in mind that the number of renders are a multiplication of the number of changes for each changed input field.

e.g. if you change 3 input fields all for 3 times, you will get 3x3x3=27 renders.

Tutorial:

All changed values can be burnt into the image, if you like. Setting in render:

result: