In addition to entering articles manually, there are two ways in which you can select articles from merchandise categories, layout modules, or the Classification system and insert them in product catalogs.

• In layout maintenance, you can click to select a class that has an article class type. (In the R/3 standard delivery, this includes 001, 200, 300 and in particular the merchandise category class type 026). The system will display that portion of the hierarchy which pertains to the selected class. You can then select one article, a subset of articles, all articles for one or more levels, or the entire sub-hierarchy, for inclusion in the layout hierarchy. The nodes of the class hierarchy will become nodes in the layout hierarchy (that is, the hierarchy structure is preserved). Articles that were already chosen during the current session are highlighted in yellow. Generic articles are highlighted as red hierarchy nodes with their variants listed underneath. The selected hierarchy portion is then inserted into the layout directly under the root level at the top of the layout, and the new nodes will be highlighted.

• In base layout area maintenance, you can click a merchandise category, a layout module, or a class that has an article class type (see above). The system displays a list of articles that belong to this merchandise category, layout module, or class. From this list you can select one, more, or all articles to be included in the layout area. Articles that have already been added to the current layout area are marked in red, and therefore cannot be selected again. Articles that were already chosen during the current session are highlighted in yellow. Individually selected variants can then be assigned to generic articles that are already in the layout area (assuming this has not already been done). The selected nodes are inserted (highlighted) at the bottom of the product list of the base layout area.