By adding a drop down to the form, you will be presented with the drop down editor. Here you can add a title describing what the drop down does, state an empty value for when no choice is selected and also add the conditions you want to appear on the drop down.
For each condition, you may also add labels which automatically get tagged to the feedback, allowing easier searching and filtering of the data later on.
Once you’ve added your conditions and closed the element editor, you return to the form again. You will see that tabs have now appeared at the top of the form for each of your added conditions
Each of these tabs is, effectively, an independent form - where you can ask questions and gain feedback relevant to the condition.
When a visitor chooses a condition, they are presented with the appropriate form to fill out when leaving feedback
Once you've edited all the forms to how you need them, save your newly edited form!
Now, whenever the relevant button is used, the visitor can make a choice of conditions to base their feedback on.