struct Viewer {
  MemoryEditor mem_edit;
  
  f32 col_anchor[3];
  f32 col_header[3];
  f32 col_footer[3];
  f32 col_key[3];
  f32 col_tfile[3];
  f32 col_page[3];
  f32 col_page_start[3];
  f32 col_checksum[3];
  f32 col_page_list[3];

  u64 base_display_addr;
  u64 latest_page_gone_to;

  // has size equal to app.inspected_file.size
  u32 *byte_colors;
};

struct Edit_Bg_Color_Data {
  RNTuple_Data *rndata;
  Viewer viewer;
};