pgadmin4/web/pgadmin/preferences/static/css/preferences.css

.preferences_dialog {
  height: 100%;
  width: 100%;
}

.preferences_content {
  padding-top: 10px;
  height: 100%;
  overflow: auto;
}

div.pgadmin-preference-body div.ajs-content {
  top: 0px !important;
  bottom: 0px !important;
}

.pgadmin-preference-body {
    min-width: 300px !important;
    min-height: 400px !important;
}

@media (min-width: 768px) {
  .pgadmin-preference-body {
    min-width: 600px !important;
    min-height: 480px !important;
  }
}

.keyboard-shortcut-label {
  font-weight: normal !important;
}