struct Viewer_Settings {
  float col_anchor[3];
  float col_header[3];
  float col_footer[3];
  float col_key[3];
  float col_tfile[3];
  float col_page[3];
  float col_page_start[3];

  u64 base_display_addr;
  u64 latest_page_gone_to;
};

struct Edit_Bg_Color_Data {
  RNTuple_Data *rndata;
  Viewer_Settings vsettings;
};