======First program start======
=====License=====
**When the program is started for the first time** a window with the license agreement appears. You must agree to the terms & conditions of the licence agreement in order to continue. **Read the license agreement carefully before proceeding!**

{{en:media::window-license.png?40%&link}}

If you do not agree, select the button **"[Cancel]"**, the program will not continue.

If you agree with the license agreement, check the box **"[ ] Understood and Accepted "** which will release the button **"[OK]"** to continue.

=====Arrangement selection=====
**Then,** an dialogue to select the preferred layout/arrangement appears. The arrangement can be changed at any time in the program itself.
Two modes are available: Compact Mode or Expert mode

{{en:media::window-arrangement.png?50%&link}}

  * **Compact Mode:**\\ The compact layout is best for beginners, who have little experience with internal ballistic simulation software, or users who prefer a more compact presentation. Newcomers tend to choose this mode, in order are not to get overwhelmed.**However, the compact display hides many details**

  * **Expert Mode:**\\ The expert mode is the regular **full view** with all input data & options. This mode is useful if you are already experienced and if you have already got to know other internal ballistic simulation software.

**Click on one of the pictures to select the desired arrangement.**

If you check **"[ ] Do not display this dialog box again"**, the selection will not be shown at the next program start. You can also change this setting in the main program.