Hi There,
Yes, installing child theme is the best practice, especially if you’re planning to modify a Theme function (like what you want to do with the prev and next navigation.), I’d just tested the code on my dev site and there is no issue.
The previous and next navigation will show you a chronological order of posts regardless of its category, this is why we need to modify the function to show posts within a category only.
There might be a 3rd party that does what you need, but regretfully we have not tested those plugins and can’t suggest any of those, with that said if you want to go in this route you need to test the plugin on your own. (WP previous and next Post Navigation)
Yes, there are cases that modified functions won’t work in the future (latest versions) because of the code changes, when this happens you need to edit your modified function on the child theme to follow the changes made, or if the modified function is causing an issue on the site then simply remove it.
You can add this to Theme Options > CSS
.archive .x-header-landmark {display: none;}
Or you can give the category a title so it does not show the generic “Category Archive” title. To do this, navigate to Posts > Categories, edit the desired category and look for the Archive Title field.
Please clarify what is wrong with breadcrumbs.
Yes, and we need to modify a template to achieve this. Please create a new thread for this.
Can you confirm that the CATEGORY IDS you entered in the field are correct?
Please add this to Theme Options > CSS
.x-colophon.bottom .x-colophon-content,
.x-colophon.bottom .x-colophon-content a {
color: #fff;
}
Hope it helps,
Cheers!