GNOME has released version 45, code name Riga, named after the capital city of Latvia. There are several important changes in this version:
The “Activities” button at the top left corner has been replaced with an icon that indicates the currently active workspace, instead of using the word “Activities” written in text.
Support for the light theme has been added, replacing the previous dark theme.
The new image viewer app, Loupe, has replaced Eye of GNOME. It now supports touch screen and touchpad gestures more effectively.
The new camera app, Snapshot, has replaced Cheese. It now supports touch screen and touchpad gestures more effectively.
Quick Settings have added a shortcut button (Super+S) and a keyboard backlight configuration option.
The status indicator now shows if the hardware camera is being used.
Several apps have transitioned to using a new sidebar that displays content in a vertical layout (full height).
TLDR: GNOME version 45, named Riga, introduces various updates, including a new workspace icon, light theme, image viewer app (Loupe), camera app (Snapshot), improved quick settings, and a vertical sidebar for some apps. The changes enhance user experience and functionality.