**@VictorBurgos](Something like Blender and UE4, but with Maya? - Content Creation - Unreal Engine Forums) **I’ve added this fix to my theme too.
If You, however, want just to fix only this issue:
.ui-tooltip-default .ui-tooltip-content span {
font-size: 12px !important;
}
.ui-tooltip-default .ui-tooltip-content br {
display: block;
margin:0;
}