When in an issue view page (e.g., Test Set, Test Execution, etc.), you may need to search for other issues associated with the one you are looking at.
Search Screen
Select Tab
You can search for recent issues or use the free text search.
Search Tab
Filters
You can search for issues using the various filters Xray provides.
Advanced search
If you need more flexibility, you can also search using JQL.
Add Selected/ Add All
Xray allows you to add selected or all issues returned.