The week scheduler let's you see one week at a time with all the tasks you have scheduled for each day. To turn on the strategy, go to ☰ → Features/Strategies → Week Scheduler:

When you activate it, you will be asked how you want to access it within Marvin.

To get to the week scheduler you can always press "W" on your keyboard in the day view or click the "Week Scheduler" tab in the sidebar, if you added it there.

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Clicking the "sliders" button at the top right let's you configure if you want to see 3, 5, 7 or 14 days at a time.

In the "Options" menu, you can also choose how tasks will be displayed in the Week Scheduler.

Using these two options you can choose whether events and all-day items will appear above your tasks.

To schedule existing tasks from your Master List into your week, press "X" or click the sidebar icon at the top right to open up the sidebar. From there you can drag and drop tasks into your days/sections just like you can in the day view. 

You can add/create tasks directly from the week view. Hover over the list header section to make the plus button appear and click it to add a task.

To edit a task you can either edit the title and use task input shortcuts (#, @, due etc.) or right-click on the task to open up an edit menu. In the Hover Button Menu strategy settings (☰ → Features/Strategies → Hover Button Menu) you can untick the "Show Quick Edit in week view" option to see all your hover buttons.