In JOSM **JOSM** you open both relations for editing in the relation-editor (on the right, select the relation from the list and click on the icon with the sheet of paper, eventually you have to make the [dialog][1] visible by clicking on the left vertical icon list, cog wheel icon.). - select all elements of one relation in the *relation editor* (click on one element in the right column and hit `ctrl+a`) - select then these elements in the map editing window by clicking on the icon with the `blue arrow pointing right` in the *Selection* column - now go to the *relation editor* window of the other relation and add all selected elements. - eventually assign *roles* to the newly added elements - now delete the first relation - confirm the modifications by clicking on the `OK` button of the relation window [1]: http://josm.openstreetmap.de/wiki/Help/Dialog/RelationList

In **JOSM** JOSM you open both relations for editing in the relation-editor (on the right, select the relation from the list and click on the icon with the sheet of paper, eventually you have to make the [dialog][1] visible by clicking on the left vertical icon list, cog wheel icon.). - select all elements of one relation in the *relation editor* (click on one element in the right column and hit `ctrl+a`) - select then these elements in the map editing window by clicking on the icon with the `blue arrow pointing right` in the *Selection* column - now go to the *relation editor* window of the other relation and add all selected elements. - eventually assign *roles* to the newly added elements - now delete the first relation - confirm the modifications by clicking on the `OK` button of the relation window [1]: http://josm.openstreetmap.de/wiki/Help/Dialog/RelationList--http://josm.openstreetmap.de/wiki/Help/Dialog/RelationList

In JOSM **JOSM** you open both relations for editing in the relation-editor (on the right, select the relation from the list and click on the icon with the sheet of paper, eventually you have to make the [dialog][1] visible by clicking on the left vertical icon list, cog wheel icon.). - select all elements of one relation in the *relation editor* (click on one element in the right column and hit `ctrl+a`) - select then these elements in the map editing window by clicking on the icon with the `blue arrow pointing right` in the *Selection* column - now go to the *relation editor* window of the other relation and add all selected elements. - eventually assign *roles* to the newly added elements - now delete the first relation - confirm the modifications by clicking on the `OK` button of the relation window [1]: http://josm.openstreetmap.de/wiki/Help/Dialog/RelationList--

In JOSM you open both relations for editing in the relation-editor (on the right, select the relation from the list and click on the icon with the sheet of paper, eventually you have to make the [dialog][1] visible by clicking on the left vertical icon list, cog wheel icon.). - select all elements of one relation in the relation editor *relation editor* (click on one element in the right column and hit "ctrl+a") and `ctrl+a`) - select then these elements in the map editing window by clicking on the map editor icon with the icon (icon `blue arrow pointing right` in the *Selection* column, blue arrow to the right) column - now go to the relation editor *relation editor* window of the other relation and add all selected elements. - eventually assign roles *roles* to the newly added elements - now delete the first relation - confirm the modifications by clicking on the `OK` button of the relation window [1]: http://josm.openstreetmap.de/wiki/Help/Dialog/RelationListhttp://josm.openstreetmap.de/wiki/Help/Dialog/RelationList--

In JOSM you open both relations for editing in the relation-editor (on the right, select the relation from the list and click on "modify", the icon with the sheet of paper, eventually you have to make the [dialog][1] visible by clicking on the left vertical icon list, cog wheel icon.). - select all elements of one relation in the relation editor (click on one element in the right column and hit "ctrl+a") and then these elements on the map editor with the icon (icon in the *Selection* column, blue arrow to the right) - now go to the relation editor window of the other relation and add all selected elements. - eventually assign roles to the newly added elements - now delete the first relation [1]: http://josm.openstreetmap.de/wiki/Help/Dialog/RelationList

In JOSM you open both relations for editing in the relation-editor (on the right, click on "modify", eventually you have to make the [dialog][1] visible by clicking on the left vertical icon list, cog wheel icon.). - select all elements of one relation in the relation editor (click on one element in the right column and hit "ctrl+a") and then these elements on the map editor with the icon (icon in the *Selection* column, blue arrow to the right) - now go to the relation editor window of the other relation and add all selected elements. - eventually assign roles to the newly added elements - now delete the first relation [1]: http://josm.openstreetmap.de/wiki/Help/Dialog/RelationList