---
sourceDocument: Yokohama Build or modify applications
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/yokohama/application-development

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama Build or modify applications

ft:clusterId :

    - cadev

bundleId :

    - cadev

workflow :

    - Development, Data, and Analytics


---

# Merge tool

# Merge tool {#ariaid-title1}

* Release version: Yokohama
* 
* Updated January 30, 2025
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

The Diff Merge tool enables administrative users to compare differences between two
versions of a record.

Administrators can compare field-level changes between two versions, apply changes using Move
Right field-level copy functionality and then merge results, or choose to revert to the
non-current version. You can access the Diff Merge tool by comparing versions, resolving
conflicts, or resolving collisions, during development or after upgrades.

## Accessibility Functions {#diff-merge-tool__section_xs3_twy_tbb}

The platform includes accessibility features that support [Web Content Accessibility Guidelines (WCAG) 2.0 level A](https://www.w3.org/WAI/WCAG20/quickref/?currentsidebar=#col_customize&levels=aa,aaa)
and make the interface accessible to users with disabilities. These features improve the user
experience when accessing platform functions with [Using accessibility features](https://www.servicenow.com/docs/access?context=keyboard-accessibility&version=yokohama&pubname=yokohama-platform-user-interface&ft:locale=en-US).  
In general, you can use the following set of standard keyboard navigation functions:

* Press Tab to navigate major groupings in a pre-defined sequence, including moving between standard interface controls (fields and lists) in a module, or between records within a tab.
* Press Shift Tab to move backwards in a pre-defined sequence.
{#diff-merge-tool__ul_o2r_5p4_sbb}

Visually impaired users can navigate the Diff Merge tool. Screen readers can read all critical
page content. All links and buttons can be reached when a section that is critical must be read.
VoiceOver audible cues describe the content of the section that is necessary to read.

To enable accessibility functions, administrators should set these sys_properties:

1. Setting glide.ui.javascript_editor to false makes the following functions accessible:
   * Script fields (such as Script Include).
   * Side-by-side script comparison.
   {#diff-merge-tool__ul_zky_5kz_tbb}
2. Setting sys_properties color settings enables high contrast visibility, which makes the left and right columns more accessible and easier to read by visually impaired users.
   * mergetool.bg.left.highlight - Left column cell color when values differ between versions.
   * mergetool.bg.right.highlight - Right column cell color when values differ between versions.
   * mergetool.bg.left - Left column cell color when version values are the same.
   * mergetool.bg.right - Right column cell color when version values are the same.
   {#diff-merge-tool__ul_lvq_w1z_tbb}
{#diff-merge-tool__ol_ngx_wzy_tbb}
**Related tasks**   

* [Compare to the current version](https://servicenow-prod.fluidtopics.net/W8M_6JIH8SvkT0LwLTD_6A "You can compare a version to the current version for any customizable object that a user has modified, such as a form layout or business rule. You can also compare the local and current pulled version of an object in Team Development. Administrators can suppress versions for specific tables.")
* [Compare a pushed version to a local version](https://servicenow-prod.fluidtopics.net/nQnfidZuo8kwLB6j_9IOgw "Code reviewers can compare the pushed versions to the local versions to see the potential effect of incoming changes.")
* [Resolve a collision in Team Development](https://servicenow-prod.fluidtopics.net/rHCSjCvfuIgcZLrCC0FLlQ "A collision is detected when the pulled version and the current local version are modifications of a different version, indicating that someone else has modified the same record that you have modified. The team dashboard displays the number of collisions between the local and the parent instance.")
* [Revert a change](https://servicenow-prod.fluidtopics.net/NQGPyTufcCXMXtY84XleWg "You can undo changes to a customized record by reverting to an older version.")
* [View customizations and compare with current version](https://servicenow-prod.fluidtopics.net/mFehRaKLWP~~W3~zm~FGwA "View the customizations that make up an update set and compare the update to the current version.")  
**Related topics**   

* [Compare two versions of an article](https://www.servicenow.com/docs/access?context=compare-two-article-versions&version=yokohama&pubname=yokohama-servicenow-platform&ft:locale=en-US)
* [Resolve conflicts for an individual record](https://www.servicenow.com/docs/access?context=um-resolve-conflict&version=yokohama&pubname=yokohama-platform-administration&ft:locale=en-US)