Erica Franz

https://premium.wpmudev.org/blog/how-to-install-wordpress-and-multisite-locally-on-macos-x-with-mamp/

If you’re planning to move these sites to a remote server, be sure to check that your host 1) allows for multi-site installs (not all hosts do!) and 2) if you want subdomain sites instead of subfolder sites you’ll need a dedicated IP address so you may need to upgrade your hosting package.

In my experience, multi-site installs are most useful if you are developing themes, plugins and so forth but less useful for managing live sites. The headache of logging into separate sites to manage them is overcome by the many plugins that don’t play well with multi-site and the initial trouble of setting it up in the first place.

What exactly are you trying to accomplish? Adding a border or removing the drop-shadow from the page images?

Breadcrumbs, easiest way to do it is through CSS if your theme doesn’t have an option to disable them through the admin. Be sure to check the style-guide for your theme if it came with one, or inquire with the theme author if you’re unsure.

What I’m seeing, in Chrome, is a left-margin between the 800px and 560px breaks, but below 560px the left-margin disappears.

It looks like you’ve amended the CSS already to reflect, but for anyone else reading this you should set your margin values in numerals instead of “none”

margin-left: 0;

Also, there’s no such thing as text-align:float-right; but both of these are correct (yielding very different results):

float: right;
text-align: right;

Sounds theme-specific, and could be you have a widget in the sidebar section which is set to display all categories. Be sure to check your widget section to be sure, on a new theme install WordPress will often place several default widgets which include a list of all categories as links.