How to search for Issues:

Process – 1 : Click Issues and there are filters use it to find like recent issues, Search for issues are there.

Process – 2 : Type issue id at the top right Search box

Process – 3 : Click Boards > Click Project board name and in left side, click Backlog

To quick edit, click on the issue id and edit it. But if you want to change epic or change sprint then click edit to open detail edit pane.

Process – 4 : Using search filters

1. Click Issues  from menu and click Search for issues
   

   

2. Choose Project, Type (issue, task or epic), Status etc (Make sure Basic is clicked otherwise JQL bar appears)
   

   

3. You can also search through contains text string 
4. If you need extra filters like Date created, sprint etc then click More and choose it.