Image – Display full size

When you added the image to the post, you inserted the Medium sized image. Delete the image from the post and insert the Large sized image.

If you don’t want the popup then clear the File URL field in the Media Library form and the image will be inserted without a link.

no, i did not insert medium sized image, i inserted maximum orginal size.

then i tried again with large size

but it keeps only showing it small and adding a link (even when i delete the URL link to opne in the image properties window)

?

When I do a View Source on that page, here is the html for the section that displays the image:

<p class="attachment">
   <a rel="lightbox[427]" title="global-times-article" href="https://graceleepromotions.com/handdiagnosis/en/wp-content/uploads/2010/12/global-times-article.jpg">
      <img width="275" height="300" title="global-times-article" alt="Global Times Article - It's All In The Palms" class="attachment-medium" src="https://graceleepromotions.com/handdiagnosis/en/wp-content/uploads/2010/12/global-times-article.jpg" />
   </a>
</p>

Notice this from the <img> tag
width="275" height="300" class="attachment-medium"
That is the medium sized image.

Since you are using a lightbox, that is possibly changing your code. (Also, I don’t see a lightbox. When I click the image I see another image the same size as the homepage image open on another page.)

You need to look at the lightbox settings to see if you can adjust the thumbnail size.

If the lightbox is a plugin, to test whether it is the problem, disable the plugin. Then see if the image displays full size. If it does you know its the lightbox.