How do I display the FKM keys in use for each log file?

Use the following xpath to search for all FKM files:

/geneos/gateway[(@name="Your_Gateway_Name_Here")]/directory/probe/managedEntity/sampler[(param("PluginName")="FKM")]/dataview/rows/row[not(contains(@name,"#"))]/cell[(@column="status")]

Example below found 25 FKM files:

Select all the items in the Search Results window and right click to launch the Show Tables command. It will generate a Show Tables tab with the FKM keys in use for each FKM file in the Output Dockable.

You may want to use the "Show List" icon to switch to a specific FKM file if there is a long list of files.