To add a contact to your Favorites in Canary on iOS, just go to the Sidebar, scroll down to “Favorites” then select Heart icon to add contact into favorites list.
To remove someone from your Favorites list, tap on the contact under your Favorites section and then tap the Heart icon again to undo it.
To move a message to the Starred folder, tap the “More Actions” icon below and select “Star.”
You can also swipe left on an email, tap “More Actions,” and then select “Star” from the menu.
Rearrange your folders in the order that you like. Go to your sidebar by pressing the more action icon.
Once the sidebar is opened, press “Edit” and drag and drop the folder in the position you want to move it and press Done.
If you wish to customize the bottom menu bar when reading an email (called ‘Thread Actions’ in Canary), you can do so by going to Canary > Settings > Thread Actions and setting them according to your preference.