I am a bit new to making this kind of thing and would like a bit of help with making a bit of code to make my form look better. 

I have a question with a drop down box with lists of towns in. At the bottom I have added the word 'Other' in case the town they live is not listed in the box. The next question is 'If other please specify' which is always viewable to everyone and I would like it to pop up when someone clicks on 'Other' instead. I have this kind of situation around 5 times through my form and would like to make them invisible unless necessary. 

I've tried to use the Actions on user input tool to hide and then show when needed but cannot figure out how to do it. 

Can anyone please explain how to do it? 

All I want is something like ---  (if town=other then show--->next question) but I don't know how to code it.

Many thanks,

Gill