Edit - All Level Divide

Edit - All Level Divide allows you to select single-layer divide mode or multilayer divide mode. Clicking on All Level Divide will toggle the mode. If this item is turned off, the mode is single-layer divide. If it is selected, indicated by a check mark in the menu entry, the mode defaults to multilayer divide.

Single-layer select means that only objects on the layer presently displayed can be divided (Edit - Divide).

In multilayer divide mode, all the objects on all levels of your circuit will be divided when you select a division line, not just the objects on the presently displayed level.

If a layer is complete, and you wish to avoid inadvertent changes on it while in multilayer select mode, you may wish to lock it through use of the Levels page in the View Options dialog box.