Despite that I have ticked the "auto-display documentation" and tried inputting different numbers in "ms" box - I still have to press CTRL+Q to see the documentation. How to make it work?
Also if I click CTRL+Q to show documentation pop up manually - the pop up is too small. Can I make it bigger by default to contain all the text?
IntelliJ IDEA 2018.1 (Ultimate Edition) Build #UI-181.4203.550
Linux Mint 18.3 Sylvia, Cinnamon 64-bit
Sounds like you want this setting:
Settings > Editor > General
> Show quick documentation on mouse move
And to make the documentation pop-up text larger:
It seems there is a bug. If you open the settings via the gear icon and tick the show toolbar it will work again (at least I was able to reproduce it and this fixed it for me).
I don't have issues with the size (I'm on mac) using IntelliJ IDEA 2018.1.2 (Ultimate Edition) Build #IU-181.4668.14.
You can create an issue on their issue tracker here: https://youtrack.jetbrains.com/issues/IDEA.
For more info about reporting issues, see: https://www.jetbrains.com/help/idea/reporting-issues.html
Update for IntelliJ 2018.2:
The code completion in IntelliJ IDEA continues to evolve, and now the IDE shows both all the possible auto-completions and Javadoc, at the same time (without the need to directly invoke Javadoc each time). Please be aware that you need to actually enable this cool new feature. Go to Preferences | Editor | General | Code Completion and turn on the Show the documentation info pop-up in… options.
(more info here: https://blog.jetbrains.com/idea/2018/05/intellij-idea-2018-2-early-access-program-is-open)
