feature request – choose whether to check

First of all, I love that this plugin exists, so thank you! I don’t always want to check the links on 3000+ pages just to check the one I’m updating, so this filled an important gap.

But I also don’t necessarily need to check all the links in a post every time I update it, so that seems resource-heavy for both me and the destination sites. I would LOVE, rather than having this check automatically on save, to have a button in the editing pane that will check the links in the post when I click on it. I’m not a programmer, though, so I don’t know how much more work that is to create.