antosdk-apps/Docify/css/main.css

afx-app-window[data-id = "Docify"] .header .label-text
{
    font-weight: bold;
}
div[data-id = "preview-container"] 
{
    overflow: auto;
    display: block;
}

canvas[data-id = "preview-canvas"] 
{
    display: block;
    margin:0 auto;
}