Hello "extend hide" lead to enlarge white space in XVI image of my extended elevation. Difficult to locate xvi content on large blank grid in small_part.th: extend hide 16@small_part 16_back@small_part in thconfig: unselect whole_cave select small_part export -fmt xvi in XVI file: { 249.53 -50.00 15@small_part} { 218.99 -46.85 16@small_part} { 218.99 -46.85 16@small_part} { 146.31 -55.71 17@small_part} { -7841.68 26268.31 16_back@small_part} { -7841.68 26268.31 16@small_part} { 146.31 -55.71 17@small_part} { 72.30 -70.08 18@small_part} { 72.30 -70.08 18@small_part} -- WBR, Vasily