IntelliJ not showing gutter icons - intellij-idea

Few weeks back my IntelliJ stopped showing 'gutter icons'. Particularly the Java interface implementation shortcut icons used to be very handy that I'm missing.
I've already checked that all Gutter icons are enabled and I have the required Plugins (Java, Spring etc.) installed.
Anything else I can try?
I'm on
MacBook Pro 13" M1 (2020)
macOS Ventura 13.2 (22D49)
IntelliJ IDEA 2022.3.2 (Ultimate Edition)
Build #IU-223.8617.56, built on January 26, 2023

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IntelliJ keeps moving cursor focus to the Build Output tool window while coding

I'm using IntelliJ IDEA CE, on macOS Monterey, and while coding it frequently builds the code base every few seconds, automatically.
This becomes very frustrating as then the cursor focus would move to the Build Output window while I'm writing my code, after every few seconds. The errors shown in the window are the obvious compile errors as I'm still writing my code.
I tried turning off "Build project automatically" and "Build project" in "Actions on Save" setting but that doesn't help. I'm not sure which setting is causing this problem.
IntelliJ IDEA 2021.3.1 (Community Edition)
Build #IC-213.6461.79, built on December 28, 2021
Runtime version: 11.0.13+7-b1751.21 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
macOS 12.1

Font is installed but doesn't show in the menu of JetBrains IntelliJ IDEA

I have updated IntelliJ IDEA recently (I have the latest possible version and build at the moment - see at the bottom) and since then my previously well chosen font with ligatures doesn't show anymore (I don't remember its name). Previously the fonts were provided in a menu, 5-6 of them and you would choose one within the IDE, but now there are a lot of fonts to choose from which I guess are taken from the system.
However, I followed these instructions from this post but still the font is not showing in the menu.
I have installed the font Fira Code (all available .ttf files: Bold, Light, Medium, Regular and Retina) on Windows, so e.g. it is available in Microsoft Word:
but even after restart it is not available in IntelliJ IDEA:
Any suggestion how to fix this?
IntelliJ IDEA 2019.2 (Ultimate Edition)
Build #IU-192.5728.98, built on July 23, 2019
Runtime version: 11-ea+125 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0
The font must be installed as an Administrator (install for all users option).
You do this by opening the context menu of the font file, then click "Install for all users".

How to make the function (f1...f10) keyboard shortcuts work in IntelliJ

I've noticed that throughout IntelliJ on MacOS, the keyboard shortcuts for anything like command+f2...f10 don't work. Neither do they trigger anything in the OS to the question is what program is catching these keyboard events. Is there any way to force IntelliJ to get them when IntelliJ is open? This happens even if the IntelliJ window is maximized/fullscreen. All other keyboard shortcuts work.
Specs:
IntelliJ IDEA 2018.2.4 (Ultimate Edition)
Build #IU-182.4505.22, built on September 18, 2018
Licensed to ****
You have a perpetual fallback license for this version
Subscription is active until January 18, 2020
JRE: 1.8.0_152-release-1248-b8 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.14.1
As #y.bedrov kindly pointed out, go to System Preferences->Keyboard and select "Use all F1, F2, etc. as standard function keys." option enabled in "System Preferences -> Keyboard". Then it works :)

IntelliJ IDEA can't show some code characters on a regular basis

As you can see, in my IntelliJ IDEA, some code characters were hidden on the editor. After restarting the IDE, the problem will be solved occasionally. Why did it happen?
Issue:
IDE and OS:
IntelliJ IDEA 2017.1.2
Build #IU-171.4249.39, built on April 25, 2017
JRE: 1.8.0_112-release-736-b16 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.13.3
Note:
I've tried to switch IDE boot JDK to oracleJDK, it seems to solve the problem mentioned above, but some of the features of the IDE have failed :(

Not able to view Dotty option while creating scala project in Intellij IDEA

I have Intellij IDEA. Below are the details about it.
IntelliJ IDEA 2017.2.5
Build #IU-172.4343.14, built on September 26, 2017
Licensed to Rajkumar Natrajan
JRE: 1.8.0_152-release-915-b12 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.12.6
I have latest scala plugin for IntelliJ installed as well.
But when I try to create the dotty project using the documentation here, I couldn't see the option. Below is the screen shot.
Do I miss any settings?
Choose SBT first, then on the next step you will be able to select Dotty:
Related ticket.