| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="settings-screen">
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| 4 | <title>Screen Tab</title>
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| 5 |
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| 6 | <body>
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| 7 | <ul>
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| 8 | <li>
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| 9 | <p><b outputclass="bold">Video Memory:</b> Sets the size of the memory provided by the
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| 10 | virtual graphics card available to the guest, in megabytes. As with the main memory, the
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| 11 | specified amount will be allocated from the host's resident memory. Based on the amount of
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| 12 | video memory, higher resolutions and color depths may be available. </p>
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| 13 | <p><ph conkeyref="vbox-conkeyref-phrases/vbox-mgr"/> will show a warning if the amount of video memory is too
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| 14 | small to be able to switch the VM into full screen mode. The minimum value depends on the number of virtual
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| 15 | monitors, the screen resolution and the color depth of the host display as well as on the use of <i>3D
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| 16 | acceleration</i> and <i>2D video acceleration</i>. A rough estimate is (<i>color depth</i> / 8) x
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| 17 | <i>vertical pixels</i> x <i>horizontal pixels</i> x <i>number of screens</i> = <i>number of bytes</i>. Extra
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| 18 | memory may be required if display acceleration is used. </p>
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| 19 | </li>
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| 20 | <li>
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| 21 | <p><b outputclass="bold">Monitor Count:</b> With this
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| 22 | setting, <ph conkeyref="vbox-conkeyref-phrases/product-name"/> can provide more than one virtual
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| 23 | monitor to a virtual machine. If a guest OS supports
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| 24 | multiple attached monitors, <ph conkeyref="vbox-conkeyref-phrases/product-name"/> can pretend that
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| 25 | multiple virtual monitors are present. Up to eight such
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| 26 | virtual monitors are supported.
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| 27 | </p>
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| 28 | <p>The output of the multiple monitors are displayed on the host in multiple VM windows which are running side
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| 29 | by side. However, in full screen and seamless mode, they use the available physical monitors attached to the
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| 30 | host. As a result, for full screen and seamless modes to work with multiple monitors, you will need at least
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| 31 | as many physical monitors as you have virtual monitors configured, or <ph
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| 32 | conkeyref="vbox-conkeyref-phrases/product-name"/> will report an error. </p>
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| 33 | <p>You can configure the relationship between guest and host monitors using the <b outputclass="bold">View</b>
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| 34 | menu by pressing Host key + Home when you are in full screen or seamless mode. </p>
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| 35 | <p>See also <xref href="KnownIssues.dita">Known Limitations</xref>. </p>
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| 36 | </li>
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| 37 | <li>
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| 38 | <p><b outputclass="bold">Scale Factor:</b> Enables
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| 39 | scaling of the display size. For multiple monitor displays,
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| 40 | you can set the scale factor for individual monitors, or
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| 41 | globally for all of the monitors. Use the slider to select a
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| 42 | scaling factor up to 200%.
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| 43 | </p>
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| 44 | <p>You can set a default scale factor for all VMs. Use the <b outputclass="bold">Display</b> tab in the
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| 45 | Preferences window. </p>
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| 46 | </li>
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| 47 | <li>
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| 48 | <p><b outputclass="bold">Graphics Controller:</b>
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| 49 | Specifies the graphics adapter type used by the guest VM.
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| 50 | Note that you must install the Guest Additions on the guest
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| 51 | VM to specify the VBoxSVGA or VMSVGA graphics controller.
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| 52 | The following options are available:
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| 53 | </p>
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| 54 | <ul>
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| 55 | <li>
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| 56 | <p><b outputclass="bold">VBoxSVGA:</b> The default
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| 57 | graphics controller for new VMs that use Windows 7 or
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| 58 | later.
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| 59 | </p>
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| 60 | <p>This graphics controller improves performance and 3D support when compared to the legacy VBoxVGA option. </p>
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| 61 | </li>
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| 62 | <li>
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| 63 | <p><b outputclass="bold">VBoxVGA:</b> Use this
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| 64 | graphics controller for legacy guest OSes. This is the
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| 65 | default graphics controller for Windows versions before
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| 66 | Windows 7 and for Oracle Solaris.
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| 67 | </p>
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| 68 | <p>3D acceleration is not supported for this graphics controller. </p>
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| 69 | </li>
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| 70 | <li>
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| 71 | <p><b outputclass="bold">VMSVGA:</b> Use this
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| 72 | graphics controller to emulate a VMware SVGA graphics
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| 73 | device. This is the default graphics controller for
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| 74 | Linux guests.
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| 75 | </p>
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| 76 | </li>
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| 77 | <li>
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| 78 | <p><b outputclass="bold">None:</b> Does not emulate
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| 79 | a graphics adapter type.
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| 80 | </p>
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| 81 | </li>
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| 82 | </ul>
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| 83 | </li>
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| 84 | <li>
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| 85 | <p><b outputclass="bold">Enable 3D Acceleration:</b> If
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| 86 | a virtual machine has Guest Additions installed, you can
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| 87 | select here whether the guest should support accelerated 3D
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| 88 | graphics. See <xref href="guestadd-3d.dita#guestadd-3d"/>.
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| 89 | </p>
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| 90 | </li>
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| 91 | </ul>
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| 92 | </body>
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| 93 |
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| 94 | </topic>
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