Does changing to a Non-O visa based on marriage provide immediate one-year validity or an initial 90-day period?

Is there some way of clearly highlighting the difference between a 'visa' and an 'extension of stay'. Even though it is clearly stated on stamps in their passport, so many people don't seem to get the implications when asking questions about changing their status. So wearisome for moderators and readers. Appreciate that the 'ins and outs' can be confusing - but it's not rocket science. I do not expect this post to make it through.

It will be helpful if you include a picture of your current stamp and visa too (with all confidential information removed)

I’m sorry, but the question doesn’t make sense to me as it’s written.

A non-o visa based on marriage is generally valid for 3 months. Most people, at the end of three months, get a one year extension of stay based on marriage to a Thai national. This requires 400K THB.

On this extension of stay, you can work and have a work permit.

You can change the reason why you are in Thailand for employment. This requires a job where you are making minimum wages (this is based on your country of passport, no minimum wage for teachers). You’ll go to the immigration office with your employer and ask them for the documents required

you can't GET a Non-O VISA from a Non-B visa/extension :(

The reason people are asking you if you're on the initial entry from the Non-B visa OR on an extension of stay based on employment from the immigration office IS you can only change the reason for your extension <- meaning you'd cancel the extension of stay based on employment you're on now, apply for a new yearly extension of stay based on marriage by meeting the financial requirements and turning in the correct documents, you'd get a 30 day under consideration stamp (during that 30 days the immigration office can send someone to your house to make sure the marriage is legit) then you go back when that 30 day stamp runs out and get the year extension inked in.

Are you on entry/first 90days stamp from Non-B visa or extension based on employment (people often refer this Non-B visa too) now?

It depends on how you are obtaining the Non O marriage...or what you are now on..

Are you now on an extension of stay ?