DECOR works with three types of cross-sections of timber members: rectangular, I-section, and round. The Cross-section group is used to select the shape of a section and to specify its sizes.
The button 
provides access to the custom sections database. This database is created gradually as you work with the application. To save a new section in the database, use the button 
which invokes the Custom sections dialog box where you can specify a name for the section.
Since the application does not verify the uniqueness of the names used, it is the user who has to take care of it.
The geometry of the specified section can be checked by clicking the Preview button 
, which will open the Preview dialog box with this section.
When you access the custom sections database, a dialog box appears that contains a list of all sections saved in the database. The sections can be deleted from the database or renamed (the Delete and Rename buttons), viewed (Preview ), or opened in the application for subsequent use. In the latter case you have to select a line with the name of the section you want to use and click the Apply button.
The Geometric Properties button of the Cross-section group invokes the Section properties dialog box which contains the geometric properties of the section (area, moments of inertia etc.) and the section with its sizes and axes.