In the good old days (v5) I could select a block and scope down so that I could assign a different texture to each side.
However, scope up & down are greyed out.
Iknow from 'carlevel' that scope up & down are available.
Can I still assign different textures?
I can fiddle it with extra blocks but was trying to avoid extra blocks.
Please advise.

yes in object properties panel, select surface tab, and you will be able to select individual faces of blocks.

Cok teshekur ediyorum.