Hello, I'm new in this list and would like to introduce. I have been caving for over 30 years and during this time I have many caves explored and measured. So far, I have always used Caverender together with AutoCAD or very early drawn the plans by hand. Now I have found Therion and I'm thrilled. However, it is somewhat difficult for me to find or to understand one or the other in the English manual . My english is a bit rusty and not so great. Also lacking in my opinion, examples and a good descriptor list in the manual. I know of course that the project Therion is doing from enthusiastic people and so I will even try as soon as I understand more from Therion involve me positively . Once it comes, I wish one or the other question to look or to answer. Now to my question: I have the following data sequence in my *.th-File: data normal from to lenght compass clino left right up down 1 2 10.83 125 -12 3.5 1.0 0.8 2.0 1 1a 1.0 125 -12 3.5 1.0 0.8 2.0 1a 1b 1.0 125 -12 3.0 0.8 1.2 1.5 1b 1c 1.0 125 -12 2.5 1.0 2.0 1.5 1c 1d 1.0 125 -12 2.0 1.5 2.0 1.0 1d 1e 1.0 125 -12 2.2 1.0 2.0 0.8 1e 1f 1.0 125 -12....... .......1j 2 0.83 125 -12 2.2 1.0 2.0 0.6 I want the data 1 to 1a ..... until 1j to 2 only may be used for the generation of a *. xvi file , but not for the production of the finished Map in plan and extended. I'd like only the main Points 1 and 2 are taken or written. So the Centerline should go directly from 1 to 2 . I hope I have expressed me in a understandable way. Many thanks for any idea Best wishes Markus