1. Stupid Simple
All you need to do is to make your List View headers literal and add a line-break tag after each letter.
Status -> S<br/>t<br/>a<br/>t<br/>u<br/>s
And this is how your List view header will look like:
2. More complex with CSS
In order to concentrate on the columns of 1 List View only, my first CSS selector will select a View by its name, that I gave to it on the form. My test List View name is “viewTestVerticalColumnHeader“. Then you can insert the following custom CSS on the view:
Here is a number of screenshots to demonstrate, how to rotate column headers with CSS:
So have fun with K2 and all the tips and tricks. By the way, I used the approach, described in this article Rotated Column Headers.