  There is ample evidence for magnetic reconnection in the solar system, but it
is a nontrivial task to visualize, to determine the proper approaches and
frames to study, and in turn to elucidate the physical processes at work in
reconnection regions from in-situ measurements of plasma particles and
electromagnetic fields. Here an overview is given of a variety of single- and
multi-spacecraft data analysis techniques that are key to revealing the context
of in-situ observations of magnetic reconnection in space and for detecting and
analyzing the diffusion regions where ions and/or electrons are demagnetized.
We focus on recent advances in the era of the Magnetospheric Multiscale
mission, which has made electron-scale, multi-point measurements of magnetic
reconnection in and around Earth's magnetosphere.
