Display Arrangement tab missing but 2nd monitor working with MacBook Pro.

Hello TheManFall,

This page here can help with providing some information and steps for using an external display with the Mac on macOS High Sierra: Use multiple displays with your Mac - Apple Support

Connect the displays

•For each display, connect a video cable (and adapter, if necessary) from a video output port on your Mac to the video input port on the display. To learn more, see Video ports.

Make sure the cables are securely

•If your Mac has one or more Thunderbolt ports , you can connect up to two displays to those ports. If the displays also have Thunderbolt ports, you can connect one display to another, and then connect one of the displays to a Thunderbolt port on your Mac. Or you can connect each display to different Thunderbolt ports on your Mac.

If a display is not recognized, choose Apple menu > System Preferences, click Displays, then click Display.

Then click the Detect Displays button. You may need to press the Option key to see the Detect Displays button.

Set up the displays as an extended desktop

You can arrange your displays in any configuration to create an extended desktop. For example, you can set your displays side by side to create one large continuous desktop.

1. Choose Apple menu > System Preferences, click Displays, then click Arrangement.

2. Follow the onscreen instructions.

This page will help out with providing the technical specifications for the MacBook Pro, which includes a note on external display support, and which adapter type it will require: MacBook Pro (13-inch, Early 2011) - Technical Specifications

•Native Mini DisplayPort output

•DVI output using Mini DisplayPort to DVI Adapter (optional)

•VGA output using Mini DisplayPort to VGA Adapter (optional)

•Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter supports 30-inch Apple Cinema HD Display (optional)

•HDMI audio and video output using a third-party Mini DisplayPort to HDMI Adapter

Cheers.