Locking a Layer...

[Hwy101]

Hans, you are right, I have to make sure the layer is not selected.
Egg, I made the change; but, still have to make sure the layer is not selected.
Seems like that should not be; but, hey, what do I know (after Exporting Error)!
Still blushing , Tom

[handrawn]

to be honest I found this a bit strange - I seem to recall a possible intermittent problem with selecting layers, but not this - just checked and I can lock a selected layer in XDPX and XPGD9[trial]

EDIT: as long as it is set the way Egg mentioned