Hi, Sven.

At the moment, sorry to disappoint you, but 

we are not able to change the + icon with our current capabilities.

 We can only stylize it to a certain extent with CSS.

Here is an example that we generally made for the little  + expander button :

You can use this CSS on the page:

table.has-columns-hidden>tbody>tr>td>span.responsiveExpander, table.has-columns-hidden>tbody>tr.detail-show>td span.responsiveExpander {
padding: 10px !important;
}

And it will increase the size of that button.

-

For background color of this element, try this :

table.has-columns-hidden > tbody > tr > td > span.responsiveExpander{  
  background-color : green !important;
}

This is how my table looks with the CSS :

You can add this to the table custom CSS, in Customize tab, of the table settings, and it should work.

If you wish to see an option to change the icon to something else,

please make a development suggestion and we will do our best to work on it soon.

Please feel free to search on our suggestions page, 

 to see if someone may be already suggested this feature. If you can't see it, feel free to add your suggestion there,  and as more people vote, the feature will move higher on the priority list.

You can certainly follow our changeLog page if you'd like ( it is also available in the plugin dashboard), where we state any changes/new features/bug fixes during updates;

and our newsletter, so you're informed about new features, bug fixes, freebies, etc.

Thank you

Hi, Sven.

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

-

I found a better CSS for this, i can see what you mean - for some reason with the "background-color" it does not correctly apply.

If we just try with "background : green", then  it works :

.wpdt-c.wdt-skin-light .wpDataTablesWrapper table.has-columns-hidden span.responsiveExpander {  
    background: green !important;
}

Let me know if that helps.