Awesome
minimap-highlight-selected package
A minimap binding for the highlight-selected package.
Customization
If you want to change the color of the minimap highlights use the following CSS rules in your user stylesheet:
/* The rule for normal highlights */
.minimap .highlight-selected {
background: blue;
}
/* The rule for selected highlights */
.minimap .highlight-selected.selected {
background: red;
}