Title: How to reduce the height of the sidebar and note list items in portable version 3.2.13?

For reducing the height of notebook list items, refer to this thread: Dead area at the bottom of notebook list when trying to condense spacing using CSS

For reducing the height of note list items, apply this CSS to userchrome.css with your desired item height (and item font height as needed):

.note-list-item-wrapper, .note-list-item {
  height: 30px !important;
}

.note-list-item span {
  font-size: 12px; 
}

Reducing note list item height may cause dead space at the bottom of the list as described here:

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