edit programming

Assuming the whole information for the fixture, from a consecutive range of cues, with the cuelist chosen :

[fixture number] touch record remove [first cue number] thru [last cue number] enter

thanks ! Q: how would be the syntax for removing a whole fixture from all QL?

Simon's suggestion will do that, just don't put in a second cue number .
So:
[fixture number] touch record remove [first cue number] thru enter

Jojo,

would you delete it from one QL or from all QL where it is used?

...from all QL in my showfile.

Sorry, I misread your question. I thought you were asking about all cues in a list

Jojo... In this case I would just remove the fixture from the show in the patch-window.

...but i don't want to loose other data eg. scenes, groups, fx, color, beam etc. ... Q: is there a syntax for that essential?

No, not for all Qlists at once...