![Read this before adding custom fields to large Jira instances | by Gonchik Tsymzhitov | Exness Tech Blog | Medium Read this before adding custom fields to large Jira instances | by Gonchik Tsymzhitov | Exness Tech Blog | Medium](https://miro.medium.com/v2/resize:fit:1400/1*8_KNWYtRi1MbgeH3ufmX3g.png)
Read this before adding custom fields to large Jira instances | by Gonchik Tsymzhitov | Exness Tech Blog | Medium
![Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver/files/1047552713/1142236314/1/1649913511921/CustomFields.png)
Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation
![Adding custom fields to emails | Administering Jira applications Data Center and Server 8.17 | Atlassian Documentation Adding custom fields to emails | Administering Jira applications Data Center and Server 8.17 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver0817/files/1071816558/1071816559/1/1625140369719/add_cf.png)
Adding custom fields to emails | Administering Jira applications Data Center and Server 8.17 | Atlassian Documentation
![Jira Custom Field user picker in search for "type: user", "collection: list" - Forge Custom UI and UI kit (beta) - The Atlassian Developer Community Jira Custom Field user picker in search for "type: user", "collection: list" - Forge Custom UI and UI kit (beta) - The Atlassian Developer Community](https://global.discourse-cdn.com/atlassiandeveloper/original/3X/b/2/b23926d46015c529a9002d980b42867f58bc111a.png)
Jira Custom Field user picker in search for "type: user", "collection: list" - Forge Custom UI and UI kit (beta) - The Atlassian Developer Community
![Managing custom fields | Administering Jira applications Data Center and Server 9.9 | Atlassian Documentation Managing custom fields | Administering Jira applications Data Center and Server 9.9 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver0909/files/1251415930/1251415931/1/1681558453551/Selected_custom_fields.png)
Managing custom fields | Administering Jira applications Data Center and Server 9.9 | Atlassian Documentation
![How to create a Custom Field calculated in JIRA with JIRA MISC addon – www.MrAddon.com ®: Jira & Confluence Administration Support Blog & Ethereum Dev Blog – [www.MrAddon.blog] ® How to create a Custom Field calculated in JIRA with JIRA MISC addon – www.MrAddon.com ®: Jira & Confluence Administration Support Blog & Ethereum Dev Blog – [www.MrAddon.blog] ®](https://jirasupport.files.wordpress.com/2016/02/jiramisc.jpg)
How to create a Custom Field calculated in JIRA with JIRA MISC addon – www.MrAddon.com ®: Jira & Confluence Administration Support Blog & Ethereum Dev Blog – [www.MrAddon.blog] ®
![Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver/files/1047552713/1167723696/1/1661953726530/configure+a+custom+field.png)
Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation
![Custom fields with global contexts | Administering Jira applications Data Center and Server 9.1 | Atlassian Documentation Custom fields with global contexts | Administering Jira applications Data Center and Server 9.1 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver0901/files/1155491454/1155491455/1/1600943256284/cfo_global_fields.png)
Custom fields with global contexts | Administering Jira applications Data Center and Server 9.1 | Atlassian Documentation
![Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver/files/1047552713/1167723692/1/1661954208469/Edit_issue+%281%29.png)
Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation
![Managing custom fields | Administering Jira applications Data Center and Server 8.17 | Atlassian Documentation Managing custom fields | Administering Jira applications Data Center and Server 8.17 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver0817/files/1141484729/1142250000/1/1657121246782/Issues_tab+%281%29.png)
Managing custom fields | Administering Jira applications Data Center and Server 8.17 | Atlassian Documentation
![Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation Adding custom fields | Administering Jira applications Data Center and Server 9.12 | Atlassian Documentation](https://confluence.atlassian.com/adminjiraserver/files/1047552713/1252332136/1/1689163908855/Edit-context.png)