Sorry; I've read about radio buttons, but I still don't understand how to deal with them as a responder (not as a creator of the pdf). I had to fill in a form where there are always three choices: Yes / No / Abstain. I accidentally ticked both Yes and Abstain, and was asked to re-do the page and send it. No matter what I tried, I could not make the tick disappear. I ended up crossing out Abstain and putting my initials next to the correction. However, I would really love to know if there is a way to uncheck. Thank you in advance.
Or if you can use 'prepare form' tool create button, go to button properties ⇾ action tab select 'Mouse UP' and from dropdown under it select 'Reset form', click 'add' and check fields you wish to reset, now when you click button it will reset selected fields.
You are very kind. I will try to apply these fixes, but I am not the creator of the form, so don't know if I will have access. If I don't, I will have a go at creating a form myself and practise the things you have described. This will be a new skill.