Open the Bullet-Journal v2 app
Tap on one of your Bullet Journals to open it
Tap on the "Year" button at the lower Left of the "Year" list screen (Only applies if your journal opens to the Month list)
Learn how to Navigate in your Journals
Tap "Edit Journal"
Tap the "Image" to select a different image from your device for the Journal Cover
Choose a different Theme Color for the Journal
Note: To "Reset" the color to default, tap "Reset". Theme Colors are only available with a paid subscription.
Enter a new name into the "Journal Name" box