Reds chars mean those codes after press key don't appear because they doing something else. But codes 128 to 159 can be change into whites, by line
FOR a=128 to 159:KEY a,CHR$(a):NEXT
Greens don't appear in PRINT because they doing something else.
Since october I have modify ROM with those characters and new keys map. Including German, French and Spanish chars on keys. And frames on function keys with Ctrl, but I can't modify ROM to change function kays right way (as whites). I don't know how to modify ROM to change function keys. I asked about this on forum, but nobody help me, and I was busy in work next few months, and I loose motivation before I found resolution.
Of couse except RUN" on code 140). I prefer:
KEY 140,STRING$(8,CHR$(224))+CHR$(250)+"run"+CHR$(34)+CHR$(13)
Now just put cursor on start file name and press Ctrl+Enter

With something like this in ROM we don't have to use key COPY.
About this Greek chars, just few more and with use latin which look tha same as Greek, we have whole alphabet. But which characters are still unnecessary?
PS.: Sorry for being so late.