Hide header and footer of article in Joomla 3.8 - joomla3.0

I am new to Joomla. I created an article. I tried to hide the header and footer section of article.
How to hide the header and footer of articles?

i found answer.
go to menus > select the menu item in which you want to hide the title of the article.
then go to "options" tab and set the "Show Title" > Hide and save it.

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ReacTabs anchor elements should have href defined to allow open in new tab

I would like to right click the navigation tab and then open a new tab which transfers the components.
Can you help me to define href in anchor elements to allow open in new tab ?
You can do that with React Portals. Also there is amazing article for that.
https://hackernoon.com/using-a-react-16-portal-to-do-something-cool-2a2d627b0202

Create clickable URL in Hue

I want to create a clickable URL in hue as shown in below image :
I found it in a blog :
https://blog.cloudera.com/blog/2016/05/how-to-process-and-index-medical-images-with-apache-hadoop-and-apache-solr/
They have not explained how they did it.
Can anyone tell me how can it be done in hue?
To summarize the video,
Drag the HTML results panel onto the dashboard, go to the HTML tab of the Editor, add a field for
text you want to display
Where url is the field of the collection (the {{ }} marks are to be included to render the field)

onsenui adding a custom image in the navigation title

Would like to know how to set an image in the navigation bar instead of the title. I would still require the left hamburger menu icon though.
Can this be easily achieved?
This was done part of their documentation of "ons-toolbar-button"
See it here: 'http://codepen.io/onsen/pen/aHmGL'
Click on the Images selection under "Toolbar Variants" to see how it looks.
[1]: http://codepen.io/onsen/pen/aHmGL

how to hide K2 intro image in content page?

I am using Joomla 3.x and K2 extension. I'd like to hide the attached image of the item in intro text, and show another image instead in the content page (full page). (The image that shown in the main page replaced by another image in the article/content page). How can I do that?
In K2, you can associate an image with an item by uploading it to the Image tag for that item. You can also add images within the content of the item as well. To accomplish what you are trying to do it would probably be easiest to do this -
Configure the category view to display the image from the image tab
Configure the detail view to NOT display the image from the image tab
Use a template override for the category item view that strips out any images in the intro text
This way you will have the image tab image display in the category and the content image shown on the detail page.
Under the category, go to "Item view options" (on the right), and select "hide" for "image".
Make sure if your category inherits from another one, you make this change in the top category

Multilingual Switch Block just for link to other pages

How Can I hide the language link that is shown in black circle?
And I wonder to know how can I just show the inactive language pages and link to their pages(in the red square)
Thanks
Based on the image, it seems that the unwanted language link is a published content. In that case, hide it is as simple as edit the content in the "Content" section and mark that content as "Not Published". In other case, if the link is not showed in the "Main page content" block but in another block, then you can go to /admin/structure/block and disable that block. Also, if the link is in "Main page content" and you are going to modify your home page, maybe using Panels, that link will disappear.
For the second question, you can go to http://drupal.org/node/754264. There is a good discussion about "show only posts of the selected language". They also proposed the "Language Switcher" module http://drupal.org/project/language_switcher, which could fit you if you use as selection filter the inactive languages.

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