Before the update we had options- Share as Text and Share as Media to share your post in the respective content types.
Share a Text Post
But to make our user interface more easy and intuitive we have updated the ways of scheduling an image or text post. Now instead of the options of Share as Text and Share as Media, if you add a link in the text box, we'll generate a preview of that link as shown below.
So if you schedule it like this, it will be published as a text post.( i.e. if anybody clicks on your post, they will be led to the link you have added)
This is how you schedule a text post with a link.
You can change the image preview still publishing it as a text post for your LinkedIn accounts. For more information click here
Share an Image Post
Now, if you want this same post to be an image post, clicking on the image of the banner where multiple images are shown will convert this text post into an image post (i.e. if anybody clicks on your post, a larger view of the image will be shown)
You can even click or more images (upto 4) if you want to add multiple images with this post.
This is how you share an image post with a link.