Merge layers

[torek87505098]

I can't merge layers? Why is that?

[Kurt Gold · Accepted solution]

That's because you have highlighted objects, and not layers.

In Illustrator they are different things.

[Mylenium · Accepted solution]

Your layers may contain conflicting appearances, i.e different strokes, fills, brushes etc. or something else that prevents them from being combined. You need to clean them up.

Mylenium

[Jacob Bugge · Accepted solution]

torek,

In addition to what Kurt said, at the bottom left of the Layers palette it actually says 1 Layer, so no two (or more) to merge.

You can select whichever objects you really wish to have together and Ctrl/Cmd+G to Group them, thereby forming one or more Groups, the latter can be preferable for ordering/managing things, in this case the buildings/structures could be in one Group and the contour lines could be in one or more Groups; to form only one group from everything corresponds to just collapsing the Layer, either way stopping them from taking up screen space.

[SudiptaG]

You can refer to the below article for more information. It may help you.

How to merge layers in illustrator