How enable button description and shortcut tooltip??

Is the issue reproducible with all custom plugins disabled (File | Settings | Plugins | Installed | ⚙ | Disable all downloaded plugins) and IDE restarted?

Also check if the following option is enabled in Shift-Shift > Registry:

I have tried to close all downloaded plugins and restart the software, but the problem still exists.....

Then I checked the configuration of the registry and found that idea.help.tooltip.enabled was checked. Then I unchecked it and restarted the software to solve the problem.

I compared the registry configuration with a classmate’s computer and found that their computer needs to check idea.help.tooltip.enabled for it to take effect, and I need to uncheck it for it to take effect. . . .

Should I check or uncheck it? Maybe it's is a bug ??

Registry configuration screenshots:

My computer information:

with a classmate’s computer and found that their computer needs to check idea.help.tooltip.enabled for it to take effect, and I need to uncheck it for it to take effect

What version of the IDE does your classmate use?

Please also provide the idea.log file (Help | Show Log in...) You can upload it to https://uploads.jetbrains.com/ and share the upload id.

The version used by my classmate is the same as mine.

The IDEA log has been uploaded,log id: 2021_12_20_LdELGAaPkkcpsb1D

Since I cannot reproduce the issue on my end, it is most likely related to caching of your particular IDE settings.

In the logs that you provided, I see the following custom plugins still enabled on every IDE launch:

Loaded custom plugins: GitHub Copilot (1.1.4.220), Guice (212.5080.8), maven-search (1.0), 
Visual Studio Code Dark Plus Theme (2.5), GitToolBox (212.8.4), Maven Helper (4.18.212.000.3), 
SequenceDiagram (2.1.4), Translation (3.2.0.1), GenerateAllSetter (2.8), Rainbow Brackets (6.21), 
MyBatisCodeHelperPro (2.9.7-183-204), JRebel and XRebel for IntelliJ (2021.4.2)

Please (1) disable them, then (2) restore IDE registry settings to defaults (there's a corresponding button in the Registry dialog), (3) restart the IDE via File | Invalidate Caches & Restart, and (4) check again if the tooltips are available with the option enabled in the Registry.

I see that you have enabled a few custom VM options too. You can try launching the IDE with the default VM options to see if it makes a difference (just delete the custom .vmoptions file, or replace its contents with that of IntelliJ IDEA.app/Contents/bin/idea.vmoptions).

If none of the above helps, try installing the latest version 2021.3 separately to see if the problem goes away for you there.

I followed the steps to complete the operation, but there is still a problem that the inverse selection will take effect.

Then I upgraded the version, and the problem remained the same.

The IDEA  2021.2 and 2021.3 log has been uploaded,log id: 2021_12_21_MG1tBr7dEEKUzcLS

1160561008 this might have been caused by settings sync - AFAICS you're syncing through the cloud. Could you please try disabling settings sync temporarily, make sure the idea.help.tooltip.enabled registry key is true and see if the tooltips are displayed properly then?

Ekaterina Valeeva Hi,I tried to turn off cloud synchronization, then set idea.help.tooltip.enabled to true, and restarted idea, and found that the problem still exists.
The IDEA 2021.3 log has been uploaded,log id:
Upload id: 2021_12_27_U1AYDtWUwQviD1Ga (file: idea.log)

1160561008 sorry for the long silence. Seems I've found the cause. Could you please check if you have the `Preferences | Appearance & Behavior | Appearance, Accessibility > Support screen readers` option enabled? If so, does it help if you turn it off?

Ekaterina Valeeva Thank you very much, this problem has been bothering me for a long time, after I closed it, the problem is solved, it has not made me so happy for a long time, thank you very much. 👍🏻 👍🏻 👍🏻 🎉🎉🎉🎉

Ahh, thanks so much!  This was driving me crazy, causing all kinds of problems (clicking on unknowable buttons based on an icon look..)  
I can confirm turning off screen reader fixed it!  (Ubuntu 22.04 Idea 2023.3.5 ultimate)