The Vim plugin in JetBrains Fleet uses the Vim engine of the IdeaVim plugin. You can view the full list of currently supported functionality in FL-10664 in youtrack.jetbrains.com.
Enable Vim emulation
Press ⌘ , to open the IDE settings and select.
Select the Enable Vim emulation checkbox.
With Vim, the caret is a block when you are in the Normal mode:
To change to the Insert mode, press i, and the cursor will become a line:
To return to the Normal mode, press Esc.