I presume you are referring to the horizontal timebars.
They are png files the plugin expects to find in the subdirectory <current skin>/epg
So check out the files that you find there in the PLi-HD skin.
They are not controlled through the skin.xml, but are loaded in the Python code.
These are the files in PLi-HD:
root@vuduo:/usr/share/enigma2/PLi-HD/epg# ls -l
-rw-r--r-- 1 1002 1002 320 Sep 5 04:47 CurrentEvent.png
-rw-r--r-- 1 1002 1002 377 Sep 5 04:47 CurrentService.png
-rw-r--r-- 1 1002 1002 159 Sep 5 04:47 OtherEvent.png
-rw-r--r-- 1 1002 1002 441 Sep 5 04:47 RecordingEvent.png
-rw-r--r-- 1 1002 1002 335 Sep 5 04:47 SelectedEvent.pngThat's it, I just missed the epg folder with * PNG files.
Thanks Thanks Thanks.
Here's a new update due GraphMultiEPG improvement.