How to display Issue Matrix table with solid borders

This article explains how to display Issue Matrix table with solid borders using the Issue Matrix app. This is ONLY applicable for Jira Server Instances.

Instructions

Login to Jira as an Administrator.
Navigate to Cogwheel > Issues > custom fields > Add custom field.
Click on All and search for "Issue Matrix" and click on Next as shown in the below screenshot:
Add a name to the custom field (for example, Issue Matrix_2)
Add the custom field to the project screen where it is required:
Here, in the below screenshot, the custom field Issue Matrix_2 is added to the B1 project screens.
Now search for the custom field, which was created in the earlier step.
For the newly created custom field, click the cog wheel > Configure > Edit Matrix Configuration > Epic and click on Next.
Configure the details, as shown below and click on Save to save the configuration.
Go to cog wheel > System > Announcement Banner.
Add the below CSS Script(s) in the Announcement Banner section and modify the custom field ID(Ex: Issue Matrix_2 has ID 10621)
1. If you want the borders to be visible only for a specific Issue Matrix table, use the below script with respective issue matrix custom field Id configured.
```
<style type="text/css">
#issue-list-panel-10621 th {
    border: 3px solid black!important;
}
 
#issue-list-panel-10621 td{
    border: 3px solid black!important;
}
</style> 
```
2. If you want the borders to be visible globally for all the Issue Matrix tables defined, use the below script.
```
<style type="text/css">
.issue-list-table th{ 
    border: 3px solid black!important;
}
 
.issue-list-table td{ 
    border: 3px solid black!important;
}
</style>
```
Click Set Banner.
With the above CSS configuration, you will be able to see the Issue Matrix Panel with the solid borders as shown below screenshot: