Reduce the font size in Notebooks sidebar

Issues
1

I need to reduce the font size in notebooks sidebar.

2

Hi Shashank,

Thank you for the question.
You can apply a custom CSS with styles.less:

.sidebar-menu-item {
  font-size: 8px;
}

.sidebar-menu-book-list-item.sidebar-menu-item {
  min-height: auto;
}