Finding a VFX

Using the VFX Selection Window

In order to open the window, click on the magnifying glass icon next to "Data Source" or "Preview On" (see here for the difference). Within this window, you can navigate through the various tabs in order to locate your VFX of choice.

NOTE: Old skills from previous expansions are found in the "Non-player actions" tab, and ground-targeted and channeled abilities are found in the "Common" tab

Once you've found it, click "Select". You can also spawn the VFX in order to verify it is the correct one.

Using the Overlay

Click on the eye icon to toggle the VFX overlay. This will show the paths to any effects which are currently spawned in the world. Note that you may need to rezone in order for it to detect certain VFXs such as static light sources or background effects.

Using the Log

If all else fails, you can enable "Log all files" in the settings dialog, then check the log using the /xllog chat command or the dalamud.log file located in %appdata%\XIVLauncher\addon\