eyeghoti

Thanks. A huge help.
Probably a dumba*** question, but what’s typically in the plugins tables then?

I saw that, but as far as I can tell it doesn’t update the attributes in pages and posts when those in the media library are updated.
It will update the attributes in pages and posts witha copy of page titles etc, but it doesn@t give you direct control over the <alt> attribute of each image.
Or am I misunderstanding something?

The only difference I can see in that page that isn’t covered by what I’ve done is that there shouldn’t have been a slash at the end of the respective URLs for siteurl and home in wp_options.
(Unfortunately another typo in my post above, a subtlety I had not spotted, so appologies again, but one that won’t work.)

(Sorry for the slow follow up on this.)

If you have edited the .css files of the theme, then these edits will be lost. If these edits were in a child theme they would be safe. If you used the customizer > additional css then these will be safe.

The changes I’ve made have been (via the site’s WP dashboard) to …
Appearance > Customize > Additional CSS
Any other changes have been through plugins and Page Builder (which was installed with the theme (Sydney)).

I have not made any changes via ftp, nor via …
Appearance > Customize > Editor
… nor …
Appearance > Customize > Edit CSS
(Selecting the latter only returns a Not found message.)

On this basis, if I understand correctly, I should be able to update the theme from Ver X to Ver X+1 without problems?

That’s the plan at the moment.
(Global header changes may be a long term solution but I’ll need to go through eerything else first.)

Thanks.
My concern comes from reading suggestions that updating the theme may trash the custom CSS. I’m unclear whether that risk is just when changing from Theme A to Theme B or whether there it is likely to affext Theme A v2 to Theme A v3.

Thanks very much.