src/lib/Plugin/Skin/icons.scss

[class^="lm-icon-"]:before, [class*=" lm-icon-"]:before {
  font-family: "fontello";
  font-style: normal;
  font-weight: normal;
  speak: none;
 
  display: inline-block;
  text-decoration: inherit;
  width: 1em;
  margin-right: .2em;
  text-align: center;
  /* opacity: .8; */
 
  /* For safety - reset parent styles, that can break glyph codes*/
  font-variant: normal;
  text-transform: none;
 
  /* fix buttons height, for twitter bootstrap */
  line-height: 1em;
 
  /* Animation center compensation - margins should be symmetric */
  /* remove if not needed */
  margin-left: .2em;
 
  /* you can be more comfortable with increased icons size */
  /* font-size: 120%; */
 
  /* Font smoothing. That was taken from TWBS */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
 
  /* Uncomment for 3D effect */
  /* text-shadow: 1px 1px 1px rgba(127, 127, 127, 0.3); */
}

.lm-icon-expand-layout:before { 
	content: "\e84a";
}

.lm-icon-plus:before { 
	content: "\e816";
}

.lm-icon-minus:before { 
	content: "\e819";
}

.lm-icon-reset-scene:before {
	content: "\e891";
}

.lm-icon-ok:before { 
	content: "\e812";
}

.lm-icon-cross:before { 
	content: "\e868";
}

.lm-icon-off:before { 
	content: "\e813";
}

.lm-icon-expand:before {
	content: "\e885";
}

.lm-icon-collapse:before { 
	content: "\e883";
}

.lm-icon-visual-visibility:before { 
	content: "\e826";
}

.lm-icon-abort:before { 
	content: "\e814";
}

.lm-icon-focus-on-visual:before { 
	content: "\e8a3";
}

.lm-icon-settings:before  { 
	content: "\e855";
}

.lm-icon-tools:before {
	content: "\e856";
}

.lm-icon-log:before {
	content: "\e8a5";
}

.lm-icon-remove:before {
	content: "\e847";
}

.lm-icon-help:before {
    content: '\e81c'
}

.lm-icon-info:before {
    content: '\e81e'
}

.lm-icon-left-open-big:before {
    content: '\e87c'
}

.lm-icon-right-open-big:before {
    content: '\e87d'
}

.lm-icon-left-open:before {
    content: '\e874'
}

.lm-icon-right-open:before {
    content: '\e875'
}

.lm-icon-screenshot:before { 
	content: "\e80f";
}

.lm-icon-help:before { 
	content: "\e81c";
}

.lm-icon-help-circle:before { 
	content: "\e81d";
}