# Layout and Common Functions
The *Devices* tab is where the devices in your system monitored by VirtualMetric can be found.
In this view:
1. The device tree is automatically generated based on device types
2. The metric tree shows the metrics for and the information about the selected server or group
3. The selected devices and metrics can be filtered
4. **Main Overview** shows various tables and charts
VirtualMetric uses the same layout on all reporting and monitoring pages. Further details are given below.
## Date Picker
You can use the datepicker to view all charts and reports in a specific date and time range.
Click the **Calendar** button to enable the datepicker.
On the datepicker, you will see two items:
1. The quick date range selection menu
2. The manual date range selection calendar
You can easily swap the date range with pre-defined ones. Click on the quick date range selection menu to see the available options.
On the quick selection menu, you will see following options:
**Live Range**: enables the use of Live timespan
**Last 15 Minutes**: to activate the last 15 minutes on charts and reports
**Last Hour**: to activate the last 60 minutes on charts and reports
**Last 6 Hours**: to activate the last 6 hours on charts and reports
**Last 24 Hours**: to activate the last 24 hours on charts and reports
**Last 7 Days**: to activate the last 7 days on charts and reports
**Last 30 Days**: to activate the last 30 days on charts and reports
**Quick Range**: enables checking a timespan at a glance
**Custom Range**: enables defining a custom range of timing
When you select an option, VirtualMetric will refresh the charts and reports without reloading the page. It will also update the **Calendar** and activate the date range.
{% hint style="info" %}
The quick date change only reflects on the current page. If you navigate to another page, you will see the session default date range. You should save your data selection in the session state.
{% endhint %}
You can also make custom date and time selections.
Select **Custom** in the quick selection menu. This will activate custom date and time selection.
After selecting a date on the calendar, you can also set the custom time range.
After setting the new time range, click **Update** to apply the changes.
## Global Filter
The global filter can be applied to the device and report tabs. To add a global filter, click on the global filter.
Select the type of the device and object.
## Pin
When the **Pin widget to windows** is clicked, the pin locks the widget, keeping it visible even when you switch between tabs.
## Minimize Widget
When the widget is minimized, only its title will be visible.
## Enable Grids
When you right click on a metric and click on **Enable Grids**, you can add/edit the widgets on the dashboard.
## Search
You can search for metrics from the **Search** field.
Other common functions can be found in the dashboard [common functions](https://docs.virtualmetric.com/dashboard/layout-and-common-functions) section.
