Opening Smart Guess - Planning Poker - for the first time

Step by step instructions

Click the Smart Guess button located under the Apps - button below the issue title:
2. Grant Smart Guess access to the required information See article: Permissions Smart Guess requires
3. Once permissions have been granted The app is displayed in the Jira issue and issue detail views, which means it is available where you need it:
Jira issue view	Jira issue detail view (a.k.a. issue glance)