I'm using android and this could be my issue but I'm so lost that I'm not sure getting on desktop would help.

I want my subreddit post titles to require a [tag] at the beginning of the title. How do I automate this? I'm in over my head and tried a lot of things and Google searched even more and after several hours Ive come here seeking guidance. ELI5 because I'm completely and totally new to programming

I need help figuring out how to post my content on reddit and I'm using my android phone to do it

What is the IDEAL size for a banner, and for a channel icon?

I'm seeing lots of conflicting info.

Banner 1920 × 384? or 1072 × 128 px for desktop and 1080 × 128 px for mobile?

Icon - square? Does size matter? 512 or what?

Thx

TL;DR: How to lock all old posts (100s) on a subreddit.

I took over a sub; it has no posts for 2 years. I am reluctant to remove everything - some of the old posts do have "value" - i.e. people might search and find useful info.

But at the same time, I want a clean start.

Previously, on another sub, I used "modnuke".

But this time, I'm wondering if I could simply lock all the old stuff, rather than removing it.

Has anyone done that? Is their a tool?

Or can I request one somewhere?

Or script it myself?

Or is it a terrible idea?

Thanks for reading.

^{Desktop android sausage}