Removing unseen entities in Complex 3-d drawings?

[muck]

I need to remove entities in turned off layers so I toggle my "ON layers" to off and

my "OFF layers" to on and erase the hidden entities then I toggle the layers back

to the orginal state. I would think that would only erase entities in unseen layers.

That is not the case. I end up erasing something in an orginal layer that is on

in the first place.

 

Is there an easy another to erase unseen entites & remove their layers and

ensure that the shown entities remain in my drawing?

 

Note I am dealing with complex 3-d drawings that have 100 plus layers with

about 10 layers turned off. Typical.

 

I am doing this to convert all layers to a single layer called Level 1 for microstation

conversions. With all the 3-blocks etc, this is becoming a challange.

 

Can anyone help?

 

 

Thank you,

[CADMASTER1128]

What AutoCAD version are you using?

[ReMark]

Layer Delete command. Look under Format > Layer Tools.

[muck]

I am using version 2009.

What I need is something that would purge unseen entities.

 

What is the difference between freeze and turning a layer off. That might

help.

[ReMark]

"Is there an easy another to erase unseen entites & remove their layers..."

 

Maybe I wasn't clear. Layer Delete.

 

This command will erase a layer and all entities on that layer whether it is on, off or frozen. The command doesn't care. That's why one must be careful when using it.

[ReMark]

Re: Layer off vs. frozen.

 

May I recommend AutoCAD Help? See Layers > turning on or off. Then on the Concept tab read the section entitled Control the visibility of objects on a layer. It clearly explains the difference between the two.