Note that this is a custom need, so you have to code some custom CSS for it.
See this example here:
<fieldset>
<div class="row">
<ul class="inlinebuttons">
<li><a href="javascript:;" class="button">--</a></li>
<li><a href="javascript:;" class="button">-</a></li>
<li><a href="javascript:;" class="button">+</a></li>
<li><a href="javascript:;" class="button">++</a></li>
</ul>
</div>
</fieldset>
Using this CSS
ul.inlinebuttons li {
display: inline-block;
}
ul.inlinebuttons li a {
position: relative;
height: auto;
padding: 0.7em 0.5em;
top: auto;
right: auto;
}
See? 10 lines of CSS :)
Also, default theme buttons comes with the blue of the toolbar as a background (since it's normally to use only there). For a clearer look, you'd better use the gradient-based theme
In the header, just replace
iui/t/default/default-theme.css
by
iui/t/defaultgrad/defaultgrad-theme.css
Which results to
Remi