Windowing is the act of removing a select branch or two higher up in a large tree to allow for a view of a scenic area. Skirting up a tree means removing some of the lower branches to allow for a view of a scenic area or to allow for passage under the tree. Both of these are presently accepted practices. We recommend you consult with your homeowners association (HOA) prior to performing this kind of work. More often the not, there are guidelines in place requiring that only non-mechanized machinery be used in conservation areas, steep slopes, wetlands, and buffers. We encourage you to use a certified arborist.