JQL

Show tickets created by a user

This will also show them in descending order, which will give you the most recently created issues first.

reporter = <username> order by created DESC

Query by project

project = "Project Name"

Find issues belonging to an inactive user

reporter in (inactiveUsers())

Search via text

text ~ "thing to search for"

Searching for multiple criteria

project = "Project Name" AND text ~ "something"

Resource: https://community.atlassian.com/t5/Jira-questions/Finding-Issues-Owned-by-Inactive-Users-with-JQL-without-buying/qaq-p/686192

Get all bugs linked with a task (PROJECT-1234)

issuetype = Bug AND issue in linkedIssues(PROJECT-1234)

Change existing issue type

For example, if you create a bug that should be a task, you can do the following:

  1. Open the issue you want to change
  2. Click More
  3. Click Move
  4. Specify the New Issue Type
  5. Click Next »
  6. Click Next »
  7. Click Move

Resources:

Weird formatting issues after saving

If your description keeps getting screwed up after you save something you’ve change in the description, be sure to click the Edit button instead of editing it inline.