Hello There,
Thanks for updating in!
do I understand correctly that the only way to create a blog page inside themes
is to create a blank page and do nothing whatsoever?
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Yes you will have to create a page and assigned that page as your Post Page. Please switch to Twenty Seventeen themes if you want to try it out. Do the following if you want as what is explained in the codex
1.) Switch your theme with Twenty Seventeen theme
2.) Create a new page, add a title and maybe some page contents as well.
3.) Go to Settings > Reading > Front Page Displays an assigned the newly created page as the Posts Page.
4.) View the page and you will only see the the recent posts items and not your page contents.
The only thing being used in the page is the page slug and the title. The contents were ignored and replaced with dynamically generated post recent items.
1.) How can I decide what category is visible and what’s not on that page?
You can’t because by default, WordPress will display all the recent items regardless of the category. The blog index display the post items in chronological order. There is however a custom solution if you want to filter out or if you want to exclude a category in the blog index. Please check out these links:
2.) How can I decide the layout of the posts?
- The layout was pre designed in the theme. For one stack that you use, you will have two option to display the blog index and that is using the standard or masonry. Please go to X > Launch > Options > Blog and select the “Style”.
3.) How can I set the number of columns on that page?
Hope this helps.