Update: 2021-05-06
Thanks to “Dmitry Jemerov” from JetBrains/IntelliJ for a update on this old topic.
Dmitry says
“In 2021.2 the limit is configurable in Settings | Advanced Settings | Maximum number of results to show in Find In Path/Show Usages preview”
If you don’t have that version then the below still applies.
Update: 2018-08-20
https://youtrack.jetbrains.com/issue/IDEA-157855
https://intellij-support.jetbrains.com/hc/en-us/community/posts/206164739–More-than-100-matches-in-search
Thanks to “Andrey Dernov” from JetBrains/IntelliJ for answer.
Andrey said:
You can set ide.usages.page.size – IntelliJ Registry option. (Help | Find Action… type Registry and set the value in dialog):
This has helped me a lot for large project refactoring.
IntelliJ Idea Registry Screenshot
IntelliJ Idea Find in Path Screenshot