For anyone already working in the support console who needs the inbox docked beside the ticket without leaving the window.
The envelope is the third icon on the top toolbar, right after Search. One click docks Mail in the same window instead of jumping you to a separate inbox. Have the support console open and signed in so the full top toolbar row is visible.
Step 01
START with the support console brought to the front and the top toolbar visible end to end.
Click its taskbar button if another window covers it. You know it is ready when every toolbar icon shows without scrolling the window.
Step 02
LOOK at the top toolbar and stop on the envelope, third icon right after Search.
Count past the first icon and Search; the envelope sits in the third slot. It is a closed envelope outline, not the speech-bubble icon beside it.
Step 03
CLICK the envelope once with the pointer centered on the icon.
Press and release the left mouse button. A brief highlight on the icon confirms the click before any panel motion.
The most common mistake
Clicking the speech-bubble icon beside the envelope opens Chat instead. Hover until the tooltip reads Mail and confirm the closed envelope shape before you click.
Pro tip
Open the Window menu on the top menu bar and choose Mail; the panel lands in the same docked position as the toolbar icon.