Hi Stefan,
To increase the size (and distance) of the buttons you need to add a width and height for the svg button (plus a margin for the distance).
The color for the svg button can be set with the appropriate button class.
Try something like the following between <style> ... </style> or in a separate stylesheet (tiddler tagged with $:/tags/Stylesheet):
.tgc-fixed {
position: fixed;
top: 60px;
width: 25px;
left: 10px;
background-color: transparent;
z-index: 200;
}
.tgc-fixed button svg {
fill: <<colour primary>>;
width: 2em;
height: 2em;
margin: 10px 0px;
}
.tgc-fixed button:hover svg {
fill: #0044BB;
}
.tgc-fixed button svg.tc-image-new-button {
fill: green;
}
Adapt to your liking.
Hope that helps.
Cheers,
Ton