As you said the 'ALT+ CMD' will transfer all compatible parameters to your new object that you select in the object settings dialogue or to one existing object that you click on in your model.
If you only want to change certain parameters of multiple objects (they can be all different sizes) in your model then you just select the ones you need and manually change just the parameters that you want.
All other parameters will be unaffected (i.e. the sizes will not change)
If it is not a parameter that you need to change - but you need to swap to an entirely new object then unfortunately you will need to do this one by one - or in selected groups where all of the parameters of the selected objects are identical.
It is not possible to swap all at once multiple objects with different parameter settings to a new object and still keep those different settings.
Barry.
One of the forum moderators.
Versions 6.5 to 27
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