David,
I looked into it. TiddlyWiki 5 converts the tooltip attribute into an html title attribute. The title attribute can't be styled. So, to get the effect you are looking for you'ld have to do some css trick like those shown on the w3schools site here
http://www.w3schools.com/css/css_tooltip.aspI created a demo here:
http://cpashow.tiddlyspot.com/#:[[Tooltip%20Stylesheet]]%20[[Tooltip%20Demo]]\define tooltipspan(tooltip, text)
<span class="tooltip">$text$
<span class="tooltiptext">$tooltip$</span>
</span>
\end
<<tooltipspan "This is a tooltip" "I have a bunch of things to say!" >>
\define tooltipdiv(tooltip, text)
<div class="tooltip">$text$
<span class="tooltiptext">$tooltip$</span>
</div>
\end
with: stylesheet =
.tooltip {
position: relative;
display: inline-block;
border-bottom: 1px dotted black;
}
.tooltip .tooltiptext {
visibility: hidden;
width: 120px;
background-color: black;
color: #fff;
text-align: center;
border-radius: 6px;
padding: 5px 0;
position: absolute;
z-index: 1;
bottom: 150%;
left: 50%;
margin-left: -60px;
}
.tooltip .tooltiptext::after {
content: "";
position: absolute;
top: 100%;
left: 50%;
margin-left: -5px;
border-width: 5px;
border-style: solid;
border-color: black transparent transparent transparent;
}
.tooltip:hover .tooltiptext {
visibility: visible;
}