How to do center alignment in multirow in Lyx

I have problem with center alignment in Lyx. You can see this on the screen.

enter image description here Is it possible to fix it somehow in the Lyx where I have only limited options to edit code?

Thank you Petr

Solution

Merge all of the cells (0,3) to (0,6), I'm using LyX version 2.1.3.

To merge all of the cells you'll need to delete the text, unmerge, then re-merge and add the text back in.

Table in Lyx. Table rendered.