Css style injection into the header. Configure any style tweaks so you do not need to patch themes or source code.
Example adapt Highrise theme to redmine backlogs:
body.theme-Highrise .rb-main #content {
margin-left:165px;margin-right:-165px;
}
body.theme-Highrise #rbcontentwrapper {
margin-right:165px;
}
body.controller-rb_master_backlogs #main {
overflow:hidden;
}
html > body.controller-rb_master_backlogs #content {
min-height: 1200px;
}
Check out the wiki at github.com/patrickatamaniuk/x_backlogs_styleadapter/wiki