# Raspberry Pi HDMI Overscan

## Getting settings right for a Rappberry Pi outputting to a 4k display (and others)

I had a problem when I moved my Raspberry Pi over to using a 4K display, which is just about the only resolution that professional displays come in these days, as manufacturers have all moved on to 4K as a standard. The problem was with overscanning and the display not having the ability to correctly scale the image signal coming from the Raspberry Pi, which was still a 1920x1080 signal.

There's a collection of settings in config.txt on the Raspberry Pi that can mitigate this problem:

• disable_overscan
• overscan_left
• overscan_right
• overscan_top
• overscan_bottom

For me, I deleted all the explicit overscan settings, and enabled the disable_overscan setting.

Here's my fixed up config.txt:

 1 2 3 4 5 6 7  enable_uart=1 disable_overscan=1 disable_splash=1 dtparam=i2c_arm=on dtparam=spi=on dtparam=audio=on gpu_mem=32 

More settings and info can be found here: https://www.opentechguides.com/how-to/article/raspberry-pi/28/raspi-display-setting.html