The Status Bar is your Photoshop dashboard.
Choose Window > Status Bar
The Status Bar appears in the bottom left corner of Photoshop.
It displays three significant pieces of information.
Document Magnification It's interactive. Type a value. Press Enter. You're there.
Document Size The number on the left represents the approximate size of the flattened file. The number on the right represents the size of the file including layer and alpha channels.
Current Tool Selected Includes a brief description and how-to-use too.
Click the small triangle to gather more information. Stay informed.