Sorry to answer in English, but I'm sure that my German is worse than your Dutch.
First select a feature (way, node) that you want as part of the relation. Than you go in the side panel to "advanced mode". At the bottom of the side panel, you get the relations. There you can use the "add to" button to add the feature to a new or an existing relation. To add the feature to an exesting relation, just search that relation in the list you view. To create a new relation, click on the "new relation" button and fill in the correct tags in advanced mode.
If the new relation is created, you can add other features to it with the same method. You can set the role of the feature in the relation side panel.
OpenStreetMap
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2011년 8월 7일 09:56에 Sanderd17님의 의견
Sorry to answer in English, but I'm sure that my German is worse than your Dutch.
First select a feature (way, node) that you want as part of the relation. Than you go in the side panel to "advanced mode". At the bottom of the side panel, you get the relations. There you can use the "add to" button to add the feature to a new or an existing relation. To add the feature to an exesting relation, just search that relation in the list you view. To create a new relation, click on the "new relation" button and fill in the correct tags in advanced mode.
If the new relation is created, you can add other features to it with the same method. You can set the role of the feature in the relation side panel.