I have black bars on the sides of my screen. How do I make fill the entire screen?

The solution to this depends on which kind of graphics card you have. See below for each solution.

Nvidia users

1. Right click desktop -> nvidia control panel -> Display -> Adjust desktop size and position

2. In the "Scaling" tab, you want to select full screen instead of aspect ratio.

AMD users

1. Right click desktop -> AMD Catalyst Control Center -> My Built-in Displays -> Properties (Built-in Display)

2. Select "Scale image to full panel size" and click apply.

If you can't find this settings, follow these these instructions.

Intel users

Intel control panels and drivers vary. Check your Intel Graphics settings (mostly likely by right-clicking on desktop) and search for Aspect Ratio settings, and set it to fullscreen/stretch. If the settings don't work, update your drivers and try again.

Windows 10 users

Get inside the game, and press ctrl+alt+f11 until you reach the desire size.

Software to make any screen fit in full screen.

See this video and follow it's instructions.

My game lags when I open Enchanting Bag or other dialogs

Turn on the "Multi-Monitor Fix" on the game launcher.