LAYMRG moves every object on the source layers (model space, layouts
and block definitions) to the target layer, drops the sources from
viewport freeze lists and colour overrides, and deletes the source
layers. LAYDEL deletes the layers and every object on them the same
way. Typed, both ask "Select object on layer to merge/delete or
[Name]:" until Enter (Undo drops the last one), LAYMRG then asks for
the target layer, and both warn and ask [Yes/No] <No> before changing
anything. Scripts answer Y. The JSON forms laymrg {from, to} and
laydel {names} never prompt.
Layer 0, Defpoints and xref-dependent layers are refused, and so is
merging a layer into itself. LAYDEL refuses the current layer; LAYMRG
merges it and makes the target current. Each run is one undo step.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
