Add some flair to your calendar plugin by enabling calendar pictures. This setting will take the medium event poster image for an event and add it to the calendar. 

Image Placeholder
To enable - go to SET UP > EVENTS > EVENT SETTINGS and click on the GENERAL SETTINGS icon. From the slide-out menu, select the Calendar Picture checkbox and press SAVE. 

Image Placeholder

If you would like to make changes to the design, you can edit the CSS on the plugin. To edit CSS, go to SET UP > WHITE LABLE > PLUGINS and then click on the CSS icon on the plugin you want to modify. 

CSS

.VBOCalendar .CalEventMulti  {
    margin: 0 0 4px 0;
}
.VBOCalendar .CalEventMulti > .CalEventInfo > .CalendarName > .CalBGImage {
    margin: 0 0 3px -5px;
    width: 105%;
}
.VBOCalendar .CalEventMulti > .CalEventInfo > .CalendarName {
    padding: 0 0 0 5px;
}

.VBOCalendar .CalCellContent {
    padding: 27px 3px 5px 3px;
    height: inherit;
    width: 100%
}

.VBOCalendar .CalDayStatus {
    padding: 2px 2px 2px 3px;
}

.VBOCalendar .CalendarName {
    overflow: hidden;
    margin: 0 0 0 0;
    padding: 0 0 0 0;
    border-radius: 2px;
    color: #FFF;
}

.VBOCalendar .CalDayStatus {
    text-transform: uppercase;
}

/* List View */
.VBOCalendar .CalListHeader {
    font-size: 14px !important;
    font-weight: bold !important;
    text-align: center;
}

.VBOCalendar .CalListDayColumn {
    margin: 0 5px 5px 0;
    flex: 1;
}

.VBOCalendar .CalListEventColumn {
    margin: 0 0 5px 0;
    flex: 3;
}

.VBOCalendar .CalListCell {
    padding: 5px;
    background-color: #EEE;
    border-radius: 2px;
    box-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}


.VBOCalendar .CalListDay {    
    font-size: 12px !important;
    font-weight: bold !important;    
}

.VBOCalendar .CalListEvents {
    background-color: #EEE;
}

.VBOCalendar .OpaqueBG {
padding: 1px 0 0 3px;
    background-color: rgba(0, 0, 0, 0.5);
}

.VBOCalendar .CalBGImage {
overflow: hidden;
    display: block;
    margin: 0 0 0 0;
    width: 100%;
    height: 60px;
    border-bottom: 2px solid #efefef;
}