In the Menu Bar, click Edit > Preferences, then on the left side of the dialog box, select MainWindow.
Show the current frame rate in the lower left corner of the Render View.
Shows all log messages in the Terminal window during rendering.
Shows hint text for buttons.
Sets the opacity for all module windows.
Toggles docking capability for VRED module windows.
Sets a language displayed in the interface.
Issue: For MAC 10.13.x users, once VRED 2019 is installed, the UI defaults to English, not the language you expect.
Solution: In VRED, select Edit > Preferences > MainWindow, then under User Language, set the language you want. Click Apply, then OK. Restart VRED.