Zoom
Zoom in and out on the IDE.
Use the shortcut ⌃⌥= (macOS) / Alt+Shift+= (Windows/Linux) to zoom in, or ⌃⌥- (macOS) / Alt+Shift+- (Windows/Linux) to zoom out.
Click the link to Reset to 100% or use the shortcut ⌃⌥0 (macOS) / Alt+Shift+0 (Windows/Linux) to Reset IDE Scale.
Alternatively, use the Quick Switch Scheme ⌃` (macOS) / Ctrl+` (Windows/Linux) to select Zoom and the zoom level.