Omarchy OS: How do I move a window to another workspace?

Press Super + Shift plus a workspace number to send the active window there.

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Omarchy OS: How do I move a window to another workspace?

For example, Super + Shift + 2 sends the focused window to workspace 2. Press Super + 2 to follow it. You can view the current workspace in the top bar.

Source: Omarchy manual.