Theme development

Hi!

I am looking for a way to add a class to a block, but not a custom class, a class from either the region name or the block machine name.

For example, with regions, this is possible:

Dear All,
In my website have some page auto added & tags. I don't know why. Please, help me how to fix it?
The error here em-strong-auto-added-to-html.jpg

How can I make certain fieldsets like"Region settings" to be collapsed by default when editing a block? They take up alot of room when uncollapsed and would like to collapse this unless you are interested in those settings.

I would like to do this in template file if possible.

http://imgur.com/a/iItiG

Hello,

I'm Drupal newbie and recently started using it. Now I want to give my site the look I designed.
And thought bootstrap was the way to go as it goes for theming. So I installed it as a subtheme and have a blank style.css wich overrules the themes own style. Now I have already used selectors as h1, h2 etc. and body. I do know basic CSS but I have no idea what selectors I need to call on for let's say the navigation bar, I want to customize the colors of the bar and just don't know where to start.
Anyone got any tips for me where to look or what to learn?

Hi!

I am learning Drupal 8 and I am stuck on a problem.

How do I create a form as a block? and thus place it wherever I please?

I know this module:
https://www.drupal.org/project/contact_block

but there isn't even 1 example to demonstrate how to procede.

Thanks :)

I've encountered an issue, and I know what the problem is (at least I'm pretty sure I do), but I don't know how to fix it.