What fonts are those? Have you restarted the IDE? How did you add them?

the font is this one

Idea does not recognize the font at the Font settings page
 

Could be the https://youtrack.jetbrains.com/issue/JRE-399. Does it help to use latest installed Oracle 1.8 JDK to run IDE: https://www.jetbrains.com/help/idea/switching-boot-jdk.html ?

The problem still exists when I switch the start sdk to oracleJDK8u181

other IDE like Eclipse can Correctly recognize this font

i start JavaFontRendererTest on JetBrains Runtime that is used to run IntelliJ IDEA and  it do not show the font

>other IDE like Eclipse can Correctly recognize this font

Eclipse uses AWT UI library. Could you try Netbeans or JEdit applications that also uses Swing as IntelliJ IDEA?
 
>i start JavaFontRendererTest on JetBrains Runtime that is used to run IntelliJ IDEA and  it do not show the font
 
Does it show the font if run on Oracle JDK?

Netbeans9 or JEdit5.5  also can't recognize font correctly.

it do not show the font when run on Oracle JDK

Please file new issue at https://youtrack.jetbrains.com/issues/IDEA with this font attached and idea.log after IDE restart. Thank you.

https://intellij-support.jetbrains.com/hc/en-us/community/posts/360001112320/comments/360000164419 

i installed intellij idea on a clean win10 build1809 and it did not see some fonts. my font is 'mononoki'.

i changed other jdk and files but it did not work.

but when i copy the font files to 'JetBrains\IntelliJ IDEA 2018.2.6\jre64\lib\fonts' which is the intellij bonded jre, the font finally show up.

i think this is some bug or sth else. my laptop is win10 but when i intstalled intellij on it win10 had some lower build version. so it works fine when upgrade to latest version.

Just work properly when open idea with administrator privileges

Jetbrains IDEA 2013.3.1 on Windows 10 build 1809 can't recognize font which I installed like Menlo.

The solution of Wadqse work properly.

https://youtrack.jetbrains.com/issue/IDEA-200145 

Hi，EveryOne，I think I found the answer in this issue Q&A.

Win10 build 1809 had changed the old font installed way. If the idea (2018.3) did not find the font , we could use these fonts by put them in JB runtime JRE /lib/font. BUT, in this way , the font render will not as well as idea recognize the same font from 'system font' (by using boulded jre , font will blur, by using oracle jdk font will too sharp and antialiasing did not do best).

how to repair this: reinstall font by right click font file (.TTF) and chose 'install for all users'. zhen , we can remove font file from  JB runtime JRE /lib/font dir. Restart idea , it can recogize font from 'system font' and rendering quality would be satisfied.

The above solution worked like a charm. Thanks Wadqse!