A layer is a logical grouping of data, assembled as though they were laid out on transparent acetate overlay sheets over a base plan. Users commonly choose to put certain related information on named layers - irrigation, planting, notes, dimensions etc. Individual layers or groups of layers can then be turned off and on so that their respective data can be viewed in or out of context with information on adjacent layers.
Layers can be used to control entity visibility. Once an entity has been placed on its own layer, the color, linetype, line thickness can be controlled by the layer settings. If needs be, the layer can be locked so that there can be no inadvertent movement of entities on it.
Handling layers - activating the Layers Properties Manager
The Layer Properties Manager can be activated in a number of ways:
The figure below shows the Layer Properties Manager in gCADPlus.
We suggest that the layer list associated with a drawing should be kept relatively short in order to be manageable. In order to keep a list manageable, remove unwanted layer.s
Mini Layer Tool
Some users prefer to see the layers status at all times while working. To that end, we have provided a mini version of the layer manager that can be 'parked' under the Properties box at at the bottom left of the drawing editor. The mini layer tool display can be controlled by an option on the view drop down menu.
Use layers extensively when you are tracing over the top of a scanned image. The example below shows a gCAD+ drawing where a new CAD logo is being made from a JPEG image file.