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is _* a purely textpad feature? I haven't seen in it in regex tutorials

is it the same as a positive lookbehind of .*?

I can see it matches characters and leaves them there in any replace..useful..saves me from having to capture and reference, so as to keep it.

I have no idea what you mean. _* has no special meaning; it matches any number of underscores, possibly none of them.

ah, my mistake.. a silly one. I saw a previous post whre you had _* then just noticed now you wrote replace _ with space.

and _* can have no effect 'cos when zero underscores..