Putty

To get Putty to display properly on LG 4k monitors, the default font needs to be changed: Window -> appearance -> Change button (next to font settings). Courier New 10-point is a good one to use for compatibility reasons as well as readability.

In order for mc to show the lines properly, you need to go to Window -> Translation -> select Remote character set as UTF-8 and Use Unicode line drawing code points

In order for yast to show the lines properly, you need to go to Connection -> data -> change Terminal-type string from xterm to linux

To change the colours go to: Window -> colours and select the colours. Put ANSI Red and ANSI Red bolk to be much lighter so they will be readable.

To save the changes for the future, go to Session, select the Default Settings and then click Save.