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= Tools > Combine Way =
[[PageOutline(2-10,Table of Contents)]]

[[Image(source:/trunk/images/combineway.svg,32,middle)]] ''Keyboard shortcut:'' '''{{{C}}}'''

'''Combine several selected ways in one.'''

* The order of selection matters, as the remaining way will keep the [wikitr:/Help/Concepts/Object#ObjectId object id] and [wikitr:/Help/Concepts/Object#ObjectHistory object history] of the first selected way with positive id.
* The ways need to be connected to each other in their end nodes and need to form one line otherwise JOSM will show a info warning and refuses the action:

[[Image(josm_refuse_combine_warning_screenshot.png)]]

* Usually, all [wikitr:/Help/Concepts/Object#Tags1 tags] with only a single value and all relation memberships from all ways will be added and the [#TagsMembershipsConflictDialog Tags/Memberships Conflict Dialog] will open if manual decisions are needed. In normal user mode it will additionally warn before adding any tag or membership the ways do not have in common.

== Combine Confirmation ==#CombineConfirmation
**Note**: Following warnings are not presented in [wikitr:/Help/ExpertMode Expert Mode].

=== Tag ===#CombineConfirmationTag
If there is any difference in [wikitr:/Help/Concepts/Object#Tags tags] or conflicting tag combinations, JOSM presents following warning and ask for confirmation:

[[Image(josm_combine_confirmation_tag_screenshot.png)]] 

=== Relation ===#CombineConfirmationRelation

If there is any difference in relation membership or role, JOSM presents following warning and ask for confirmation:

[[Image(josm_combine_confirmation_relation_screenshot.png)]]


== Tags/Memberships Conflict Dialog ==#TagsMembershipsConflictDialog
If there is any conflicting tag value, membership or role where JOSM cannot find a solution, the Tags/Memberships Conflict Dialog will open up in order to solve the conflict manually.

[[Image(josm_TagsMembership_conflict_dialog_screenshot.png)]]

The dialog is divided into two parts where the upper part is for tags and the lower part is for memberships and roles.

=== Tags ===#TagsConflictDialog
[[Image(josm_TagsMembership_conflict_all_screenshot.png,right,margin=15)]]

==== Filter ====
On top there are two check boxes to filter the tags:
* **''Show tags with conflict only''** is checked by default to only show the tags not in common. Unchecking will reveal all tags.
* **''Show tags with multiple values only''** shows only the tags with conflicts in values

==== Background Color ====
Additionally the background color indicates the conflicts:
 **white** - common tag (no conflict) \\
 **green** - single value conflict \\
 **red** - multiple values conflict

==== Value Column ====
With the drop down menus in the value column you can solve the conflicts and remove tags.
The options are:
* all single values of the different objects
* ''**none**'' - the tag will be removed
* ''**all**'' - all values are used for a key, separated by a semicolon

If the key is representing a quantity like `capacity=*` or `step_count=*` there is one more option:
* ''**sum**'' - sums up all numerical values of the selected objects

=== Memberships and Roles ===#MembershipsConflictDialog
[[Image(josm_TagsMembership_conflict_membership_screenshot.png,right,margin=15)]]

==== Memberships ====
With the two columns on the far right, **''Keep''** and **''Remove''**, the decision on the membership can be made.

==== Background Color ====
The background colors are:
 **grey** - delete membership, remove object from relation \\
 **green** - keep membership \\
 **red** - undecided, needs to be set manually

==== Roles ====
Roles can be changed by editing the entry in the role column or with the **''Role''** text box beneath the membership list.
==== Tag modified relations ====
On the bottom line are a check box **''Tag modified relation with''** and a text box for **''Key''** and **''Value''** in order to add a tag to all modified relations by checking the box and entering a key-value combination.

== See also ==
 * [[Image(source:/trunk/images/splitway.png,middle)]] [wikitr:/Help/Action/SplitWay Split Way]
 * [[Image(source:/trunk/images/joinareas.svg,middle)]] [wikitr:/Help/Action/JoinAreas Join Areas]


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