The Edit tools allow you to modify existing entities; many of the these tools require you to first select the entities you wish to modify.
You can also use the Entity Inspector to modify many of an entity's properties.
Tools described in this section:
> Undo
> Redo
> Undo History
> Cut
> Copy
> Copy To Other Layer
> Paste
> Select
> Arrange
> Entities
> Align
> Tidy
> Trim
> Transform
> Rebridge
> Quick Rebridge
> Explode
> Quick Explode
> Optimise Slots
> Delete
> Delete Last
> Delete Current Layer